La-Mg-Ni Based Alloys

La-Mg-Ni Based Alloys Abstract: Degradation behaviors of La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19 alloys were studied. The results indicate that severe pulverization and corrosion are important factors leading to the capacity deterioration. However, it is puzzled that corrosion of the electrochemical cycled alloys is aggravated, which is inconsistent with the result that La2MgNi9 present poor cycling stability andalso the assumption that alloy with high Mg content is easy to be corroded. Then, the intrinsic anti-corrosion and anti-pulverization characteristics were mainly focused in the first part of this work. Immersion experiments demonstrate that the Mg-rich phases are more easily to be corroded. The intrinsic anti-corrosion resistance of the three alloys presents an improved trend which is inversely proportional to the abundance of the Mg-rich phases. However, the intrinsic anti-pulverization ability just presents an inverse trend, which is closely related to mechanical property of the phase structures. LaNi5 with the highest hardness is easy to crack, but the soft (La,Mg)Ni2 is more resistant to crack formation and spreading, suggesting a possibility to improve the anti-pulverization ability by adjusting the phase constitution. In general, the weaker corroded extent of La2MgNi9 in the electrochemical test is attributed to its better intrinsic anti-pulverization capability though the intrinsic anti-corrosion of La2MgNi9 is worse. As to La4MgNi19 which possesses excellent intrinsic anti-corrosion resistant, enhancement of the anti-pulverization ability is the key issue to improve the cycling stability. 1 Introduction Superlattice La-Mg-Ni based hydrogen storage alloys have received substantial attentions over the last decade because the excellent electrochemical performances used in nickel/metal hydride (Ni/MH) battery [1-5]. Up to now, A2B7 type alloys have been successful developed for the practical use [3]. However, AB2 and AB3 type alloys present poor cycling stability though the theoretical discharge capacities are higher than A2B7 type alloys [6-8]. In addition, A5B19 type alloys have been reported to possess good electrochemical performances, but they still need improvement to meet the practical application, especially on the cycling stability in the long-term reversible cycles [9-10]. It is well accepted that electrochemical capacity decrease of the metal hydride electrodes is caused by both the physical and chemical degradation [11-12]. In La-Mg-Ni system, factors affecting the capacity degradation were emphasized on pulverization and corrosion during the charge/discharge cyclings [13-17]. Corrosion leads to damage and disappearance of the phases which possess considerable hydrogen storage capacity. It has been reported that La-Mg-Ni alloys are easily to be corroded into La(OH)3 and Mg(OH)2 [13-15]. And these kinds of corrosion products are loose and passive which cannot protect the matrix for further corrosion [15-16]. Severe pulverization of La-Mg-Ni alloys during cycling had also been reported in many works [13-17]. Pulverization makes fresh surface of the electrodes alloys continuously exposed to the electrolyte and dramatically improves development of corrosion. Liu et al. classified the degradation process of the La-Mg-Ni-Co alloy into three stages: the pul verization and Mg oxidation stage, the Mg and La oxidation stage and the oxidation and passivation stage [14]. In addition, capacity degradation of the metal hydrides is closely related to the structural changes during absorption/desorption cycling. Our previous works demonstrated that transformation from crystallinity to amorphous viz. hydrogen induced amorphization (HIA) of La-Mg-Ni alloys occurred during the hydrogenation cycles and remarkably worsens both the gas-solid and electrochemical storage performances [18-19]. Understanding of the degradation mechanisms is the precondition for improvement of the cycling stability of the La-Mg-Ni based alloys. Several compounds including AB2, AB3, A2B7 and A5B19 type phase exist in this system, and the alloys usually present multi-phase microstructure. Though quiet a number of efforts have been applied on the degradation characters of the La-Mg-Ni based alloys, these works mainly focused on the overall capacity deterioration behaviors of the alloys. Diversity of the degradation characteristics of various compounds in this system is also lacking. In the present study, degradation mechanisms of three typical La-Mg-Ni alloys: La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19 have been systematically investigated. In the first part of this work, corrosion and pulverization behaviors of the alloys, especially the intrinsic characteristics of the AB3, A2B7 and A5B19 type La-Mg-Ni phases during absorption/desorption cycling were generated. In a following paper, HIA and its in fluence on the hydrogen storage properties are discussed. 2 Experimental materials and methods 2.1 Alloy preparation The as-cast La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19 alloy was prepared by induction levitation melting under argon atmosphere. The as-cast alloys were remelted twice for homogeneity. Appropriate excess of Mg was added in order to compensate for the evaporative loss of Mg during melting. Then the as-cast La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19 alloys were annealed at 1143, 1173 and 1193 K respectively for 6 h protected in argon atmosphere. 2.2 Characterization The sample was fine polished and then etched using a mixed etchant (including water, ethanol, acetic acid, picric acid, nitric acid and hydrochloric acid) at 343K. Then metallographic microstructure of the alloys was observed using a laser scanning confocal microscope (LSCM: Olympus-OLS4000). Phase constitution of the alloys was also characterized by a scanning electron microscopy (SEM: FEI-Qanta 400) under backscatter electron mode (BSE) applied on the unetched samples. The chemical composition of various phases was studied by energy dispersive spectroscopy (EDS) equipped in the SEM. Crystal structures of the alloys were measured by an X-ray diffractometer (XRD: Bruker-D8 Advance) with Cu KÃŽÂ ±1 radiation. Micro-morphologies and selected area electron diffraction (SAED) were applied by means of a transmission electron microscopy (TEM: JEOL-2100 and FEI-F20) to examine the microstructural and crystallographic information. TEM samples were firstly crushed the bulk into fine powder , and then ultrasonic dispersion was performed in ethanol for 1800 s. Several drops of the mixed liquid were laid on a carbon membrane support on the copper grid, and dried in a vacuum oven. Particle size of the cycled alloys was tested by a laser particle size analyzer (Malvern-Mastersizer 3000) where the alloy particles were dispersed by absolute alcohol. Oxygen content of the electrochemical cycled and immersed alloys was performed on a nitrogen/oxygen tester (NCS-ON3000). Before the oxygen test, samples were immersed in deionized water for 24 h, then washed using absolute alcohol twice to remove the residual KOH, and dried in a vacuum drying oven. 2.3 Hydrogen storage properties Gas-solid cycling and PCT isotherm measurement were carried out by Suzuki -2SDWIN PCT system at 303K (Sieverts type). Before the PCT analysis, sample was activated as follow: evacuated at 473 K for 2 h, placed to 303K, hydrogenated under 3Mpa H2 (Purity 99.999%) pressure for 5 h, evacuated at 573 K for 2 h again. Each cycle consists of absorption at 2MPa for 600s and desorption by evacuating at 298K for 1200 s. For the electrochemical measurement, the alloy particles (40-50 µm) were mixed with carbonyl nickel powder in a weight ratio of 1:5 and cold pressed to form a pellet about 1g firstly. The pellets were then packed in a Ni foam substrate spot-welded with a Ni strip. The simulated three-electrode cell including a working electrode (metal hydride), a counter electrode (NiOOH/Ni(OH)2) and a reference electrode (Hg/HgO) was installed. Before electrochemical test, the alloy metal hydride electrode was immersed in 6 M KOH aqueous solution for 1d. The measurement to get the maximum capacity and cycling stability was to charge at current density of 105 mA/g for 4h followed by a rest of 10min, then discharged at the same current density to the cut-off voltage of -0.6 V. 3 Results and discussions 3.1 Microstructure and hydrogen storage performances LSCM and BSE micrographs of the three alloys are shown in Fig.1. Four contrasts can be detected in the La2MgNi9 alloy. The chemical quantitations of various contrast from EDS analysis are listed in Table 1, from which the four phases are speculated to be (La,Mg)Ni2, (La,Mg)Ni3, (La,Mg)2Ni7 and LaNi5. Five crystal structures including CaCu5-type, MgCu4Sn-type, PuNi3-type, Ce2Ni7-type and Gd2Co7-type are identified in XRD profile of the La2MgNi9 alloy, as shown in Fig.2. The structural parameters and phase abundance are refined and listed in Table 2. The results are in consistent with the metallographic observation that the main phase is (La,Mg)Ni3, then (La,Mg)Ni2and (La,Mg)2Ni7, but content of LaNi5 is rare. In case of the La1.5Mg0.5Ni7 and La4MgNi19 alloy, metallographic and XRD characterization indicate that (La,Mg)Ni2disappears, (La,Mg)5Ni19 emerges and LaNi5 increases with elevation of the B-side stoichiometry. The main phase of the La1.5Mg0.5Ni7 and La4MgNi19 alloy is (La,Mg)2Ni7 and (La,Mg)5Ni19 respectively, and the structural parameters and phase abundance are also listed in Table 2. Fig.3 displays P-C-Tcurves of the alloys, and the detailed data are given in Table 3. Theoretically, hydrogenation capability increases with reduction of the B-side stoichiometry in the La-Mg-Ni based alloys. However, the maximum hydrogen absorption content of the La2MgNi9 alloy is slightly lower than the La1.5Mg0.5Ni7 alloy. It is ascribed to the fact that some (La,Mg)Ni2 which can hardly absorb and desorb hydrogen at room temperature [8], existing in the La2MgNi9 alloy. The three alloys have analogic hydrogen absorption plateau. But both the desorption pressure and the reversible hydrogen capacity elevate with increase of the B-side stoichiometry of the three alloys. Reversible hydrogen capacity of the AB3-typed La2MgNi9 alloy is only 1.15 wt%, and the hysteresis effect is more evident than the other alloys. Electrochemical discharge curves and performances of the alloys are shown in Fig.4 and Table 3 respectively. Discharge capacities of the La2MgNi9 and La4MgNi19 alloy are lower than the La1.5Mg0.5Ni7 alloy. The lower discharge capacity of La2MgNi9 is due to the weak reversible hydrogen storage capacity. As to the La4MgNi19 alloy, it is attributed to high abundance of LaNi5 which is unsuited for the electrochemical application without alloying [20]. Furthermore, La1.5Mg0.5Ni7 presents better cycling stability than the other two alloys. Capacity retention after 100 cycles of the La2MgNi9 alloy is similar with that of the La4MgNi19 alloy. 3.2 Degradation characteristics after electrochemical cycling From morphology and EDS results of the alloys, it is clear that pulverization and corrosion have occurred after electrochemical cycling by 100 times (only La2MgNi9 alloy presents in Fig.5). XRD analysis shows that La(OH)3, Mg(OH)2 and La2O3 appear in the cycled alloys, as displayed in Fig.6. Likewise, morphology and SAED analysis of TEM confirm existence of La(OH)3 combined with La2O3 (stick-like), Mg(OH)2 (needle-like) and MgO (particles), which are marked with 1, 2 and 3 respectively as illustrated in Fig.7. The results are in consistent with the other literature studied on the corrosion products of a La1.5Mg0.5Ni7 alloy [21]. Detailed determinations of TEM are provided in the supplementary information (Fig.S1-S3). In addition, size and amount of La(OH)3 and La2O3 are obvious than that of Mg(OH)2 and MgO, indicating that corrosion of La is significant in the electrochemical environment. Mg(OH)2 and MgO are close to the alloy surface but very loose. It agrees well with the previous works that corrosion products of Mg are gel-type and cannot form a solid protection layer for further corrosion [15-16]. Compared among the three alloys, it is noteworthy that corrosion productions of the La2MgNi9alloy are less than the other alloys (see in Fig.6). Identically, oxygen contents of the electrochemical cycled alloys follow the order that La2MgNi9 1.5Mg0.5Ni7 4MgNi19, indicating that the corroded extent are aggravated (see in Fig.8). It is puzzled that the result is inconsistent with the electrochemical performances that La2MgNi9 possesses poor cycling stability. It also disagrees with the consideration that high Mg content is harmful to the corrosion resistance in La-Mg-Ni based alloys [22-24]. In order to comprehend this fact further, the intrinsic anti-corrosion resistance of the three alloys was investigated next. 3.3 The intrinsic anti-corrosion properties To avoid impacts of pulverization on the corrosion behaviors, the alloy particles with the same diameter (around 40 ÃŽÂ ¼m) were immersed in KOH solution at 60  °C for 15 d. Then the morphology, phase structure and oxygen content were measured for characterization of the intrinsic corrosion behaviors. SEM micrographs and EDS analysis of the alloy particles illustrate that severe corrosion occurred after immersion, the typical results are shown in Fig.9 (only La2MgNi9 alloy particles are given here). Compared to the electrochemical cycled alloys, the stick-like products which have been confirmed as composite of La(OH)3 and La2O3, are remarkable in the immersed samples which is due to aggravated corrosion at higher temperature. XRD profiles identify that the corrosion products are mainly La(OH)3, but La2O3 cannot be detected in the immersed alloys, as shown in Fig.10. Coincidently, SAED by TEM found that the stick-shaped phase is single-phase La(OH)3, as shown in Fig.11. The result suggests that La2O3 transforms to La(OH)3 during evolution of the corrosion process. Besides, Mg(OH)2 and MgO are also found existing in the immersed samples, and their morphologies are same with that in the electrochemical cycled alloys. However, Mg(OH)2can only be detected in La2MgNi9 from the identifications of XRD, indicating that corrosion of Mg is violent in La2MgNi9. Fig.12 is the oxygen contents of the immersed alloys, from which severity of corrosion of the three alloys are La2MgNi9 > La1.5Mg0.5Ni7 > La4MgNi19. To provide detailed information of the relationship between the corrosion behaviors and phase constitution, immersion test applied on the massive samples has also been studied (the condition is same with that of the powder samples). Fig.13 shows the SEM-BSE micrographs of the immersed samples (only La1.5Mg0.5Ni7 alloy are present here). Obviously, the corroded extent is inhomogeneous which is considered to be caused by differences of the anti-corrosion capabilities of the various phases. EDS analysis on two regions with diverse corrosion grades (as marked with 1 and 2 in Fig.13) shows no Mg but less O existing in region 1. Whereas, more Mg and O are detected in region 2 with severe corroded extent than region 1. Likewise, EDS-mapping indicates that the region possessing more Mg presents richer O, as shown in Fig.14. Similar result is more evident in the as-cast alloys, which is attributed to the inhomogeneous chemical composition and microstructure of the as-cast alloy, details can b e seen in the supplementary (Fig. S4 and S5). The aforementioned results demonstrate that the Mg-rich phases are easy to be corroded in the alkaline solution. It has been well demonstrated that Mg solubility in La-Mg-Ni alloys follows the order that (La,Mg)Ni2> (La,Mg)Ni3 > (La,Mg)2Ni7 > (La,Mg)5Ni19 > LaNi5 [25]. Thus the intrinsic anti-corrosion resistances of various phases in the La-Mg-Ni system are considered to be according with the inverse trend. This result is in agreement with several works where AB2and AB3 type La-Mg-Ni alloys have suffered serious corrosion after electrochemical experiments [8, 23-24]. The tendency is also exactly identical with that the anti-corrosion resistance is inversely proportional to the abundance of the Mg-rich phases. La2MgNi9 presents worse anti-corrosion capability because contents of the Mg-rich (La,Mg)Ni2and(La,Mg)Ni3 arehigher thanthe other two alloys. However, trend of the intrinsic anti-corrosion resistance is opposite to the corrosion extent of the three alloys after electrochemical cyclings. Concern to the fact that corrosion extent of the electrode alloys is also closely related to severity of pulverization during the electrochemical charge/discharge process, the pulverization properties of the alloys are carefully characterized then. 3.4 The intrinsic anti-pulverization properties In order to avoid influence of the additives in the electrochemical test on characterization of the intrinsic pulverization behaviors, the alloys are gaseous hydrogenated and dehydrogenated for 30 cycles. Morphology observation indicates that remarkable pulverization has occurred where decrease of the particle size and emergence of cracks can be seen clearly in the cycled alloys, as shown in Fig.15 (only La2MgNi9 alloy are present here). Then the particles sizes before (Sb) and after (Sa) cycling are measured and the size retention is calculated by Sb/Sa. It (Fig.16) shows that severity of pulverization for the three alloys are La2MgNi9 1.5Mg0.5Ni7 4MgNi19, which is just contrary to the tendency of the corrosion extent after the immersion experiment. Combined with the results of the intrinsic anti-corrosion and pulverization characterization, we can conclude that the weaker corrosion extent of La2MgNi9 in the electrochemical test is attributed to its better intrinsic anti-pulverization capability though the intrinsic anti-corrosion of La2MgNi9 is worse. It has been well accepted that pulverization is induced by the cell volume expansion upon hydrogen absorption [11-12]. Thus, large volume change leads to severe pulverization. Unfortunately, exact measurement of the volume expansion in the present work is difficult due to the multi-phase microstructure. Instead, we summarize the volume changes according to other experimental works where microstructures of these alloys are all sing-phase to ensure the accuracy as far as possible. Based on the data as listed in Table 4, there is no regular trend for the volume changes among the various structures in La-Mg-Ni system. And, no special relationship between the reported volume expansion data and the pulverization performances in the present work can be found. Besides, pulverization is believed to depend on the mechanical properties of the alloys [11-12]. Alloys with the more ductile character are more resistant to pulverization than the brittle materials. Usually, hydrogen storage alloys ar e hard and brittle, thus measuring ductility directly is difficult. Alternatively, Vickers hardness has been used to evaluate the preference of pulverization for the hydrogen storage alloys. And, previous works have found an almost inverse relationship between Vickers hardness and the pulverization rate [11-12, 30], suggesting the availability of Vickers hardness measurement on characterization of the anti-pulverization ability. Fig.17 gives indentations of the various phases in La2MgNi9 and La1.5Mg0.5Ni7 alloy. Evolution of Vickers hardness can be seen in Fig.18. It presents a linear relation between the Vickers hardness and B-side stoichiometry of the structures, which also agrees well with the pulverization behaviors of the alloys. Obviously, the mechanical property is an important factor affecting the anti-pulverization ability in the La-Mg-Ni phases. It is found that hardness differences of the AB3, A2B7 and A5B19 type phase are small. Under low loading of the hardness test, micro-cracks can hardly be observed in all the above three phases. Since the test force increase, micro-cracks can be seen in all these phases, but there is no obvious difference between them. Differently, LaNi5 is the hard phase, but hardness of (La,Mg)Ni2 is far more lower than the other phases. To comprehend more understanding on the crack formation of various phases, a massive sample with a polished surface was partial charged by electrochemical method, and the morphology and distribution of crack was observed. To highlight character of the hard and soft phase, the as-cast La2MgNi9 alloy was selected for the high abundance of LaNi5 and (La,Mg)Ni2. Microstructure characteristics of the as-cast La2MgNi9 alloy are given in the supplementary (Fig.S6-S7). As shown in Fig.19, quite a number of cracks can be observed in the sample which is only charged for 10 min. Most of the cracks exist in LaNi5 with the darkest contrast in the BSE image. One reason is that LaNi5 is the catalytic phase that primarily charged in the La-Mg-Ni system [31-32]. More importantly, it also ascribes to the brittle character of LaNi5 which agrees well with the above result that the hard phase is easy to crack formation. It is noteworthy that cracks are often stopped in front of (La,Mg)Ni2. Obviously, the soft phase is more resistant to crack formation and able to prevent the crack spreading. Similar result has been reported in other literatures where ductile secondary phases are believed to be beneficial to the cycling stability [33]. According to the above results, we can conclude that La4MgNi19 alloy is easy to pulverization as the high abundance of the hard phases LaNi5 and (La,Mg)5Ni19. As to La2MgNi9, little LaNi5 but existence of the soft (La,Mg)Ni2 and (La,Mg)Ni3 make it more resistant to crack emergence. These findings enlighten a way to improve the anti-pulverization ability by introduction appropriate abundance and distribution of soft secondary phases. 4 Conclusions In the present study, corrosion and pulverization behaviors of three typical La-Mg-Ni alloys: La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19 have been systematically investigated. All the alloys present multi-phase microstructure with (La,Mg)Ni3, (La,Mg)2Ni7and (La,Mg)5Ni19 as the main phase respectively. La1.5Mg0.5Ni7 possesses better electrochemical properties among the three alloys. It is found that pulverization and corrosion with the main product La(OH)3, combined with La2O3, Mg(OH)2 and MgO, have occurred after the electrochemical cycling. The overall corrosion extent of the electrochemical cycled alloys follow the order that La2MgNi9 1.5Mg0.5Ni7 4MgNi19. Immersion test demonstrate that the Mg-rich phases are easy to be corroded in the alkaline solution. The intrinsic anti-corrosion resistance are found to be La2MgNi9 1.5Mg0.5Ni7 4MgNi19, which is inversely proportional to the abundance of the Mg-rich phases. However, the intrinsic anti-pulverization ability just presents an inverse tre nd that La2MgNi9 > La1.5Mg0.5Ni7 > La4MgNi19. It is found that the mechanical property is an important factor affecting the anti-pulverization ability. Vickers hardness elevates with increase of the B-side stoichiometry of the various phases, which agrees well with the pulverization behaviors of the alloys. Furthermore, LaNi5 with the highest hardness is found to be easy to crack formation, but the soft (La,Mg)Ni2 is more resistant to crack formation and able to prevent the crack spreading. The weaker corrosion extent of La2MgNi9 in the electrochemical test is attributed to its better intrinsic anti-pulverization capability though the intrinsic anti-corrosion of La2MgNi9 is worse. Acknowledgments The authors are grateful to the Natural Science Foundation of China (NO. 51371094) and Natural Science Foundation Application of Inner Mongolia (NO.2014MS0526) for financial support. References [1]J Chen, N Kuriyama, H T Takeshita, H Tanaka, T Sakai, M Haruta. Hydrogen storage alloys with PuNi3-type structure as metal hydride electrodes. Electrochemical and Solid State Letters, 2000, 3: 249-252. [2]T Kohno, H Yoshida, F Kawashima, T Inaba, I Sakai, M Yamamoto, M Kanda. Hydrogen storage properties of new ternary system alloys: La2MgNi9, La5Mg2Ni23, La3MgNi14. Journal of Alloys and Compounds, 2000, 311: L5-L7. [3]S Yasuoka, Y Magari, T Murata, T Tadayoshi, J Ishida, H Nakamura, T Nohma, K Masaru. Development of high-capacity nickel-metal hydride batteries using superlattice hydrogen-absorbing alloys. Journal of Power Sources, 2006, 156: 662-666. [4]Y F Liu, Y H Cao, L Huang, M X Gao, H G Pan. 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Beowulf Questions Essay

1. Realize that this prologue introduces the Danes, not Beowulf or his people the Geats. What was unusual about the way Shield came to be ruler of the Danes? What was his funeral like? What relation is Hrothgar to Shield? Unlike Hrothgar, Shield became king because he had the ability to take down the enemies. Hrothgar became king through wealth. When Shield died the Danes buried him and his treasures in the sea. Hrothgar happens to be Shield’s grandson [Heorot is Attacked] (lines 86-188, pp. 34-36) 1. Grendel, the monster, attached thirty warriors while they were asleep and ran home with their bodies for a couple of nights. This devastated the Danes and the sorrow soon spread overseas. What magnificent work did Hrothgar undertake? Who attacked it, and with what result? How long did the attacks last? What was the response of the Danes? [The Hero Comes to Heorot] (Lines 189-490, pp. 36-42) 1. What does Beowulf do when he hears of Hrothgar’s problems with Grendel? When Beowulf hears of Hrothgar’s problems with Grendel, he immediately rounded up a boat and his bravest men to go were there help was needed. (Denmark) 2. Whom do the Geats first meet when they arrive in Denmark? What does he do, and what do they do? When the Geats first arrive in Denmark, the meet Hrothgar’s lieutenant who was patrolling along the cliffs. He questioned the Geats to figure out why they were there and warned them no one passes without permission or a password/sign. They then replied they were there to save the Danes from the monster. 3. They next meet Hrothgar’s herald. Who is he? What does he tell them? What does he tell Hrothgar? What does Hrothgar respond? Are you surprised that Hrothgar knows Beowulf so well? Hrothgar’s herald interrogates the Geats about where they’ve come from and what they’re doing. He’s impressed by their mighty appearance. Hrothgar is thrilled the men are there to help which is strange because he doesn’t know them to well yet is letting them on the land. 4. What does Beowulf tell Hrothgar when he enters? What did Hrothgar do for Beowulf’s father? Beowulf tells Hrothgar that his men follow Higlac. (King of Geats) Hrothgar knew Beowulf’s father because he was a famous soldier known as a leader of men. [Feast at Heorot] (Lines 491-661, pp. 42-46) 1. What does Unferth accuse Beowulf of? How does Beowulf answer him? How is this episode relevant to the poem as a whole? What does Beowulf accuse Unferth of? Unferth accuses Beowulf of losing a swimming match and will once again have to have defeat with Grendel. Beowulf retaliates by accusing Unferth of drunkenness and describes what happen in the swimming match. This is relevant because Unferth may indeed be correct; Beowulf would have met defeat again if it wasn’t for Wiglaf. 2. What is Queen Wealhtheow doing during the feasting? At the feast she offers drinks to all the men present. She distributes food and drink, and also strives for goodwill and peace. [The Fight with Grendel] (Lines 662-835, pp. 46-49) 1. Heroic poetry normally has a scene in which the hero arms for battle. What is different about Beowulf’s preparations for his fight with Grendel? Beowulf prepares for battle differently than any other heroic poetry scene. He doesn’t do much preparing. He is more anxious to get rid of the monster. He was prepared however to fight without a sword. 2. What happens when Grendel enters Heorot? How does Beowulf fight with him? What happens when Grendel tries to leave? Does Grendel escape? What does he leave behind? When Grendel enters Heorot, he became furious searching for the warriors until he found them and kills one Geat. While fighting the monster, Beowulf uses his bare hands. Grendel does escape, however; he somehow managed to leave behind his arm. [Celebration at Heorot] (Lines 836-1250, pp. 49-60) 1.When the Danes and Geats return from following Grendel’s tracks to the mere, someone sings in Beowulf’s presence, comparing him to Sigemund and saying that he was not like Heremod (lines 883-914). How is Beowulf like Sigemund? How is he not like Heremod? (Be alert for inserted stories such as this one. Beowulf contains many of them, most much more complex that this one.) 2. How does Hrothgar respond to Beowulf’s deed? What does he offer to do for him? What does Unferth have to say now? 3. The singer sings of Finn during the feasting (lines 1070-1158). The exact details of the Finn story are not clear, but in general, what happens? What does it suggest about the wisdom of using a woman as bride to heal enmity between tribes? 4. When the feasting resumes, what does Wealhtheow ask Hrothgar not to do? 5. Wealhtheow gives Beowulf a large, broad necklace. What later happens to it? What does Wealhtheow ask Beowulf to do? 6. Why do so many men remain in the beer hall to sleep? Why is it a mistake? BEOWULF AND GRENDEL’S MOTHER (lines 1251-2199, pp. 60-79) [Another Attack] (lines 1251-1382, pp. 60-62) 1.Why has Grendel’s mother come to Heorot? Is it the same reason Grendel had? Grendel’s mother comes to Heorot to seek revenge and take her sons claw back. 2. What is Hrothgar’s response? Whom has Grendel’s mother killed? Hrothgar was thankful that the Danes grief ended and the arm hanging was proof of victory. He hoped that Beowulf can stop Grendel’s mother from destructing his town again. Grendel’s mother killed Hrothgar’s closest friend 3.What sort of place is the mere? The mere is was under the water. It was full of mud, water, and dark. [Beowulf Fights Grendel’s Mother] (Lines 1383-1650, pp. 63-68) 1. How does Beowulf tell Hrothgar to respond? Beowulf agrees to fight again for the Danes. He feels it is an honor and the last battle made him a bit more confident to do it. 2. What happens at the mere before Beowulf enters it? Before Beowulf enters the mere, he sinks for hours going down in the water. 3. How does Beowulf prepare for the battle? What sword does he take with him? Beowulf prepared for battle by telling Hrothgar what his wishes are if he may die. Beowulf took his ring-marked blade. 4. What happens when Beowulf enters the mere? What is surprising about where Grendel and his mother live in the mere? When he finally lands, Grendel’s mother grabs him, but his armor protects him. To me its not surprising that the monsters live in a dark place, however; it is surprising that it takes half a day to get down there. 5. What happens to the sword Beowulf borrowed from Unferth? Beowulf strikes at Grendel’s mother with the borrowed sword, Hrunting, but the blade has no effect and breaks 6. At one point Beowulf is on the floor, with Grendel’s mother sitting on him and drawing her knife. How does Beowulf escape? Beowulf escapes Grendel’s mother by having the strength and faith to defeat her and using his strength to get off the ground. 7. How does Beowulf kill Grendel’s mother? What weapon does he use? What happens when she dies? What does Beowulf take with him from her home? What happens to the sword he used to kill her? Beowulf drew a sword he seen hanging on her wall to cut right through her neck and break all her bones. After her death the light shone very bright. Beowulf beheaded Grendel and took it with him and half of what was left of the sword. (The other half was in Grendel’s mother) 8. What happens when Beowulf returns to the surface? Did his men expect him to return? When Beowulf returns from the surface nobody is there. They all had suspected that Grendel’s mother had killed him. [Further Celebration at Heorot] (Lines 1651-1798, pp. 68-71) 1. What does Beowulf give to Hrothgar? 2. What message does Hrothgar have for Beowulf? What and why does he tell us about Heremod? Why and how did Heremod die? What lesson does Hrothgar teach with the Heremod example? 3. What does Beowulf give to Unferth as he leaves? [Beowulf Returns Home] (Lines 1799-2199, pp. 71-79) 1. What future does Hrothgar predict for Beowulf? 2. Who is Hygd and why is she not like Modthryth? 3. Beowulf reports to Hygelac that Hrothgar may marry his daughter Freawaru to Ingeld. Why does he plan to do that? What does Beowulf expect the result will be? (Remember the Finn story, lines 1070-1158.) How does Beowulf think the peace will be broken? Is this the type of report we expected from the hero Beowulf, or are we seeing a new side of him? 4. How does Beowulf report about his own adventures? Does he report accurately? 5. What does Beowulf do with the treasure he was given? What does Hygelac give him? BEOWULF AND THE DRAGON (lines 2200-3182, pp. 79-99) [The Dragon Wakes] (lines 2200-2509, pp. 79-86) 1.How much later does Part 2 take place? What kings have died in the meanwhile? What danger now exists? 2. Why is the dragon angry? Why did the man take a cup? How did the treasure come to be there in the first place? (The speech of the lone survivor, the one who put the gold in the barrow, is in a typically Old English elegiac tone. 3. What did the dragon destroy that evening? 4. Why does Beowulf think his home was burnt? Why does he order a new shield? How will he fight this battle? What will happen to him? 5. How did Hygelac die? (The description in lines 2354-2379 begins one of several versions of Geatish history and Hygelac’s death we will get.) What did Beowulf do after Hygelac’s death? What happened when he returned home? Did he accept Hygd’s offer to become king? 6. What happened to Hygelac’s son Heardred? (That’s the story in lines 2380-2390.) How did Beowulf plan to revenge Heardred’s death (lines 2391-2396)? 7. How many men accompany Beowulf as he goes to meet the dragon? Fourteen of Beowulf’s bravest men accompany him to fight the dragon. 8. What happened to Hygelac’s oldest brother Herebeald? Who killed him? What did this do to his father King Hrethel? (This passage, lines 2425-2509, is the second account of Geatish history and of the death of Hygelac.) What happened between the Swedes and Geats after Hrethel’s death? What happened to Haethcyn? How die Beowulf revenge Hygelac’s death? [Beowulf Attacks the Dragon] (Lines 2510-2820, pp. 86-92) 1. What does Beowulf tell his companions to do? Beowulf tells his companions to stay on top of the barrow in safety, observing the fight rather than participating in it. 2. What happens the first time Beowulf and the dragon fight? What do his companions do? How is Wiglaf different? What does he tell the others? What does he then do? The first time Beowulf fights the dragon his â€Å"brave† companions flee the scene. With the exception of Wiglaf. He reminded the men they should have all repaid Beowulf then ran off to go help kill the dragon 3. What happens the second time Beowulf meets the dragon? What happens to Beowulf? Who kills the dragon? Beowulf’s sword fails and makes him humiliated/ afraid for his life. The dragon hits Beowulf with another blast of fire. Beowulf took the final swing but both men, Beowulf and Wiglaf, killed the dragon. 4. What does the dying Beowulf ask Wiglaf to do? What happens when Beowulf sees the gold? How does Beowulf want to be buried? Beowulf asks Wiglaf to get him the treasure so he may see it. Then Beowulf thanks God for getting rid of the dragon. He asks to be burned at the coastal headland and it be known as Beowulf’s Barrow. [Beowulf’s Funeral] (Lines 2821-3182, pp. 92-99) 1. What happens when the companions return? What does Wiglaf say to him? What does he expect will happen in the future? Wiglaf tells them that they will now lead a shameful life, t would be better if they had died. 2. What does the messenger tell the city? (This passage, lines 2900-3027, is the third account of the history of the Geats and the death of Hygelac. These are the enemies that will attack the Geats when they learn of Beowulf’s death.) What happened overnight in Ravenswood after Ongentheow killed Haethcyn? What happened the next morning? What happened to Ongentheow? What does the messenger say to do with the gold? What is the final image (animal) of the messenger’s speech? 3. What does Wiglaf tell the crowd that comes to see the dragon and Beowulf? 4. What happens to the dragon? 5. What happens during and after the funeral celebration? 6. What did the Geats say about Beowulf in the last three lines of the poem? Are these the terms one would expect to be used t o describe a military hero?

Western Heritage 8th Edition

Brittney Henley Pd. 2A Chapter 12: Age of Religious Wars Key Topics; -War between Calvinists and Catholics in France. -The Spanish occupation of the Netherlands. -Struggle for supremacy between England and Spain. -The devastation of Central Europe during the Thirty Years’ War. Vocabulary |Notes | | | | |Counter Reformation- A movement within the Rome |Renewed Religious Struggle | |Catholic Church that sought to revitalize the |Peace of Augsburg (1555)- A regions rule would determine its religion, However it | |church and oppose Protestantism. did not recognize Non Lutheran Protestants | | |Geneva became a refuge for persecuted protestants and an international school for | |Baroque Art- 3 dimensional display of life and |protestant leaders | |energy. | | | | |Politiques- Ruler who urged tolerance and |French Wars of Religion | |moderation and compromise on religious matters |Anti-Protestant Measures and the struggle for political power | | |French Protestants are known as Hu guenots. | |They were persecuted by the French, when King Charles of Germany / Spain captured | |Huguenots- French Protestants. |Frances King’. To pacify King Charles, France persecutes the Huguenots in the | | |hopes of gaining the freedom of the King of France. | | | | |Edict of Fontainebleau—Subjected French Protestants to the inquisition | | |France remain hostile to the protestants until King Henry of Navarre gains the | | |throne | | | | | |3 competing fraction for the Kings (Francis II) ear in France | | |Bourbons- power in the south and west | | |Montmorency-Chatillons- controlled the center of France | | |Guises- dominate in eastern France / Strongest power and had more influence over | | |the king due to family connection | | |Bourbons and Montmorency-Chatillons developed strong Huguenot sympathies | | | | | |Conspiracy of Amboise (1560) – Bourbons and Montmorency-Chatillons plotted to | | |kidnap the king of France (Frances II) | | | | | |Appeal of Calvinism | | |Huguenots were in important geographic areas and were heavily represented among | | |the more powerful segments of French society. They wanted to establish sovereignty| | |with in France. | | | | | |Catherine De Medici and the Guises | | |Catherine mother to 15 year old Frances II becomes the regent of France upon the | | |death of her husband Henry II. | |On the death of Frances II her younger son Charles IX becomes king where she | | |resides as regent. Catherine fears the power of the Guiles family and sought | | |alliances with the Protestants. | | |She issues the January Edict which allows protestants freedom to worship publicly | | |outside of towns. | | |Duke of Guise surprised a protestant congregation at Vassy, Champagne and | | |massacred the worshipers.This is the beginning of the French wars of Religion | | |March 1562 | | | | | | | | |Peace of Saint-Germain-en-Laye (1570) | | |Ended the thirty year war, the crown acknowledging the power of the Protest ant | | |nobility, granted Huguenots religious freedoms within their territory. | | |Catherine fearing the mounting power of the other two families and Protestants she| |Coligny: leader of the Huguenots, Charles IX most|cultivates the support of the Guise. | |trusted advisor. | | | |The Saint Bartholomew’s Day Massacre | | |Catherine tried to have Coligny assassinated by a bullet.Fearing the fallout from| | |the attempt, she convinces King Charles that the Huguenots were attempting to | | |attack Paris | | |On Saint Bartholomew’s Day August 24, 1572, Coligny and 3000 Huguenots were | | |massacred in Paris. Within 3days another 20,000 were executed | | | | | |The Rise to Power of Henry Navarre | | |Henry III sought the middle ground and gained support from a growing body of | |Protestant Resistance Theory: |neutral Catholics and Huguenots. | | | |John Knox- wrote First Blast of the Trumpet |Peace of Beaulieu (May 1576)- granted the Huguenots almost complete religio us and | |against the Terrible Regiment of Women |civil freedom. It was later recanted because of political pressure of the Catholic| |-He declared removal of a heathen tyrant was |League. Both religious orders pick up arms. | |permissible | | | |Henry Navarre led the Protestant army. Henry III brother-in-law) | |Francois Hotman- wrote Franco-Gallia | | |-Humanist argument that representative Estate |Day of the Barricades –Henry III surprise attack on the Catholic League (Spain | |General held more authority then the French king |Supported) and failed. Henry then assassinated the Duke and Cardinal of Guise. | | |Reprisal from the League was fierce causing Henry III to join forces with Henry | |Theodore Beza- wrote On the Right of Magistrates |Navarre. Henry III was killed; Henry IV (Navarre) is the next successor to the | |Over their Subjects |throne. |-Permissible for lower authorities to overthrow | | |tyrannical rulers |Protestant as king, the League wants France to be Catholic but politically weak so| | |Spain sends in troops to help achieve this goal in hopes of putting his daughter | |Philippe du Plessis Mornay- Defense of Liberty |on the throne. | |Against Tyrants |The French rallied behind their king disbanding the League and outing the Spanish. | |-Princes, Nobles and magistrates are guardians |Henry IV turns Catholic.Ending the war of religion in France | |and to take up arms against tyranny in other land| | | | | | | | | |Edict of Nantes | | |Proclaimed a formal religious settlement it recognized minor religions in an | | |official Catholic country | | | | | |Treaty of Vervins -ended hostility between France and Spain | | | | | |Imperial Spain and the Reign of Philip II | | |Gold Silver and bullion were being imported from Spain’s colonies in the New | | |World. | | |The increased wealth and population in large cities in Europe triggered inflation. | | | | | |Fewer jobs, less food, wages stagnated and greater coinage in circul ation while | | |prices increased. | | | | |The Revolt in the Netherlands- | | |Antoine Perrenot- Cardinal Granvelle. | | |Perrenot hoped to break the local autonomy of the Netherlands providences and | | |establish a centralized royal government directed from Madrid, and religious | | |conformity to Catholic. | | |Granvelle proceeded to reorganize the Netherlands. | |William of Nassau (Prince of Orange) & Count of Egmont organized the Dutch | | |nobility in opposition, which had Granvelle removed from office | | | | | |The Compromise- | | |Margaret (Regent of Spain) spurned the protesters. Leads them to call for aid and | | |rebel against Spain; however the nobility does not support the rebellion. | | |Duke of Alba-sent to the Netherlands to gain control back. | | |He had several thousand suspected heretics publicly executed. | | |He then taxed the people of Netherlands to pay for the suppressing of the revolt. | | | | |Pacification of Ghent- | | |November 4 1576: Spanish mercen aries ran amok in Antwerp killing 7000 people in | | |the streets known as the Spanish fury. | | | | | |Pacification of Ghent (November 8, 1575)- Catholic regions and Protestant regions | | |in the Netherlands unified to oppose Spain. | | | | | |Perpetual Edict- provided for removal of all Spanish troops from the Netherlands | | |within 20 days. | | | | | | | |Netherlands Independence- | | |King of Spain Phillip II declared William of Orange an outlaw. | | |December 1580 William of Orange publicly denounced Phillip as a Heathen and tyrant| | |and should not be obeyed. | | |Known as The Apology. | | |Peace of Westphalia in 1648 – Netherlands is fully recognized | | | | | | | | | | | | | | | | | | | |England and Spain 1553-1603 | | |[pic] | | | | | |Jane Grey (granddaughter to Henry), 3rd Queen | | | | | | | | | | | |Mary I – reign lasted 5 years | | |Edward VI died. | | |Lady Jane Grey tried to ascend to throne. | | |Mary Tudor was the rightful heir. Grey-9 days Queen then beheaded. | | |Mary marries Prince Philip II of Spain. Mary | | |Had Parliament repeal the Protestant laws.Mary | | |Decreed all of England Catholic, burned Protestant leaders at the stake. | | |Dies 1558 | | | | |The Compromise: A solemn pledge to resist the |Elizabeth I – takes throne 1558 | |decrees of Trent and the Inquisition. |Daughter of Henry and half sister to Mary. | | |Advisor William Cecil. | |Passed laws for religious toleration | | | | | |Act of Supremacy 1559- Repealing all anti-Protestant legislation of Mary Tudor. | | | | | |Phillip II seeks marriage with Elizabeth. | | |Mary Stuart, Queen of Scots seeks England throne. | | |Supporters claim Elizabeth is illegitimate. | | |Queen of Scots is the granddaughter to Henry the VIII’s sister Margaret. | |Raised French and Catholic. | | | | | |Deterioration of Relation with Spain | | |Spanish Duke of Alba (1547)- marched troops into the Netherlands; England sees | | |this as a threat du e its close proximity to England. | | |Elizabeth allows pirating of Spanish vessels. | | | | |Mary Queen of Scots | | |Elizabeth executes Mary Queen of Scotts (second cousin) for plotting against the | | |crown. | | |Mary’s husband is killed by her lover, who is acquitted, and then marries Mary. | | |This causes outrage from her people. | | |Mary surrenders her throne to her one year old son James VI, who later becomes | | |Elizabeth’s heir to throne. | |The pope authorize Spain to invade England for the killing of Mary who was their | | |hope to turn England Catholic | | | | | |The Armanda | | |May 30 1587 -130 ships with 25,000 sailors sent to invade England. | | |Spain wanted the ships to dock in France before continuing the invasion. | | |France prohibits the ships from leaving and a fog roles in around the channel. | | |England has advantage and wins. | | | | |Thirty Year War | | |Preconditions for War | | |Germany = Holly Rome | | |Germany consists of 360 a utonomous entities. | | |Each had its own tolls, taxes, coins and religion, making it difficult to travel | | |and do business | | | | |Four Periods of War- | | |Bohemian (1618-1625) Swedish (1630-1635) | | |Danish (1625-1629) Swedish-French (1635-1648) | | | | | |Bohemian Period- | | |Ferdinand ascends to the throne and wants to return the region to Catholicism. | | |He revokes the religious freedoms of the Bohemian Protestants. | | | | | |Defenestration of Prague- Protestant nobility in Prague throw Ferdinand III’s | | |regents out of window in reaction to the revoke of religious freedoms. They did | | |not die, landed on manure which cushioned their fall. | | | | |Ferdinand was managed to subdue the Protestants and re-Catholicize Bohemian | | | | | |Danish Period- (1625-1629) | | |Lutheran King Christian IV of Demark picks up Protestant banner-invades Germany | | |and loses. | | |Ferdinand attacks Demark and breaks Protestant resistance. | | |Causes fear among all Protestants. | | | | | |Edict of Restitution in 1629- Calvinism is illegal and orders the return of all | | |church lands acquired by the Lutherans. | | | | | | | |The Swedish Periods (1630-1635) | | |Gustavus Adolphus king of Sweden | | |Was a unified Lutheran nation, bankrolled by France, an wished to keep the | | |Habsburg armies tied down in Germany. | | |Adolphus won several battles due to a lighter army and better weapons. | | |Adolphus is killed on the battlefield. | | | | |Peace of Prague in 1635- majority of the Protestants states reached a compromise | | |with Ferdinand, barring the Swedes | | | | | |Peace of Prague plunged them into the fourth war. | | | | | |The Swedish-French Period (1635-1648) | | |The French join the war in 1635. | | |Dragged on for 13 years with Spanish, French and Swedish soldiers looting Germany. | | | | |About 1/3 of the German population died as a direct result of the war. | | | | | |Treaty of Westphalia- | | | | | |The Treaty of Westph alia 1648 -brought all hostilities within the Holy Roman | | |Empire to an end.Ended Edict of Restitution and reasserted the Peace of Augsburg,| | |which allows each ruler to determine its religion. | | | | | |German princes become supreme over their principalities. | Summary: From Martin Luther’s death in 1546 until the middle of the seventeenth century, European life was dominated by religiously and politically inspired violence. France descended into nearly 50 years of civil war before emerging with a united monarchy under the terms of the Edict of Nantes in 1598. Spain escaped civil strife and remained firmly Catholic.Spain’s American empire provided immense wealth, but Spain failed to subdue Protestant nationalism in the Netherlands and suffered defeat of its Armada naval fleet at the hands of the English. As a result, Spain’s position in international affairs declined. Unlike the French, the English managed to avoid civil war under the inspired leadership of Queen Elizabeth I. In Germany, the original center of the Reformation, Lutherans and Catholics had come to tolerate each other. But in the early seventeenth century the temporary compromises collapsed. The resulting free-for-all, known as the Thirty Years’ War (1618–1648), consumed much of Europe’s energies until it was resolved in the Peace of Westphalia. ———————– Elizabeth I 4th, Queen Mary I 2nd, Queen Edward VI 1st, King Henry VIII King

The Basic Training Of Pavlo Hummel - 1615 Words

In The Basic Training of Pavlo Hummel. The Vietnam Plays, Volume One, Slaughterhouse Five, and A Long Way Gone survival in war is portrayed from the ability to overcome extreme states of conflict and war through training, luck, and personal determination. All of these works tell the story of survival, though not all the protagonist survive. In The Basic Training of Pavlo Hummel. The Vietnam Plays, Volume One, The protagonist Pavlo Hummel is trained to survive even after the opening chapter starts with his death. In Slaughterhouse Five the protagonist Billy Pilgrim survives through shear luck as he bumbles his way through the war and in A Long Way Gone the protagonist Ishmael Beah ends up surviving through his determination to leave the†¦show more content†¦Gonna tell you little bit about what you do you comin’ through the woods, you find a man wounded in his chest. You gotta seal it off. That wound workin’ like a valve, pullin’ in air, makin’ p ressure to collapse that man’s lung; you get him to breathe out and hold his breath. You apply the metal-foil side a the waterproof wrapping of the first-aid dressing, tie it off. Gonna hafta tie it extra; you use your poncho, his poncho, you get strips of cloth. You tear up you own damn shirt. I don’t care. You let that boy have his lung. You let him breathe.† (Rabe, 55-56). This training is specific to saving the life of and relying on your fellow soldiers. Sergeant Tower is determined that all recruits under his care learn the valuable lessons of how to survive. Again, Sergeant Tower gives sage advice on survival when he teaches the soldiers how to kill in hand-to-hand combat when he states, â€Å"This here real life, Gen’lmen. You actin’ like there ain’t never been a war in this world. Don’t you know what I’m sayin’? You got to want to put this steel into a man. You got to want to cut him, hurt him, make him die. (Rabe 38). This lesson in survival describes brutal killing in a kill or be killed scenario. The dominant technique that Rabe has Sergeant Tower express multiple times throughout the story is the ability