测定了LaNi5-xAlx(x=0,0.1,0.2,0.3)系合金在吸放氢过程中的贮氢性能.结果表明,贮氢容量随合金中Al含量的增加而降低,平台压力和热力学焓变和熵变随合金中A1含量的增加而降低,合金形成氢化物的稳定性增强;LaNi5-xAlx系合金在吸放氢过程中的平台压力存在一定的差异,即滞后现象,滞后系数随合金中Al含量的增加而降低,这是LaNi5-xAlx系的晶胞体积随合金中Al含量的增加而增加的必然结果;LaNi5-xAlx系合金的吸放氢动力学参数也与合金中的Al含量有关,活化能随Al含量的增加而降低,但活化能不存在数量级的差异.
参考文献
| [1] | Penzhorn R D .Evaluation of ZrCo and Other Getters for Tritium Handling and Storge[J].Journal of Nuclear Materials,1990,170:217-231. |
| [2] | Zhang W;Cimato J;Goudy A J .The Hydriding and Dehydriding Kinetics of Some LaNi5-xAlx Alloys[J].Journal of Alloys and Compounds,1993,201:175-179. |
| [3] | T.Haraki;N.inomata .Hydrogen desorption kinetics of hydrides of LaNi_4.5Al_0.5, LaNi_4.5Mn_0.5 and LaNi_2.5Co_2.5[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(0):407-411. |
| [4] | Wang X L;Suda S .Kinetics of the Hydriding-Dehydriding Reactions of the Hydrogen-Metal Hydride Systems[J].Journal of Hydrogen Energy,1992,17:139-147. |
| [5] | Zhao Shuang;Lin Qin;Chen Ning .Calculation and Predication for the Hydriding Propertics of LaNi5-xMx Alloys[J].Journal of Alloys and Compounds,1999,287:57-61. |
| [6] | Gouay A J;Wallingford K A .Desorption Kinetics of LaNi5,LaNi4.7Al0.3,(CFM)Ni5 and Mn4.5Al0.5 Hydrides[J].Journal of the Less-Common Metals,1984,99:249-256. |
| [7] | Wang X L;Suda S .Reaction Kinetics of Metal Hydrides under Quasi-Isothermal Conditions[J].Journal of the Less-Common Metals,1991,172/174:969-982. |
| [8] | Wang X L;Suda S .A Dehydriding Kinetic Study of LaNi4.7Al0.3Hydride by a Step-Wise Method[J].Journal of the Less-Common Metals,1990,159:83-90. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%