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| STUDIES OF PHASE RELATIONS BETWEEN MISCHMETAL (Mm) AND MmNi_5 TOGETHER WITH THEIR HYDROGEN ABSORPTION PROPERTIES |
| CHE Guangcan; LIANG Jingkui; YU Yude (Institute of Physics; Academia Sinica; Beijing) |
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Cite this article:
CHE Guangcan; LIANG Jingkui; YU Yude (Institute of Physics; Academia Sinica; Beijing). STUDIES OF PHASE RELATIONS BETWEEN MISCHMETAL (Mm) AND MmNi_5 TOGETHER WITH THEIR HYDROGEN ABSORPTION PROPERTIES. Acta Metall Sin, 1986, 22(5): 106-111.
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Abstract X-ray diffraction, DTA and other methods were used to determine the phase relations between native mischmetal (Mm) and MmNi_5 as well as the phase diagram of LaNi_5-PrNi_5 pseudo-binary system. The hydrogen desorption capacities and hydrogen adsorption plateau pressure of LaNi_5-PrNi_5 (CeNi_5, NdNi_5) system varied with the compositions of specimens and the hydrogen absorption properties of La-rich and Ce-rich MmNi_5 were also studied. The free energy, △Z, the enthalpy, △H, and the entropy, △S, of the hydride of La-rich MmNi_5 were estimated to be 6.14 kJ/mol H_2,-20.92 kJ/mol H_2 and-90.8 J/K.mol H_2 respectively.
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Received: 18 May 1986
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1 车广灿;俞育德;梁敬魁,物理学报,33(1984) ,770．
2 梁敬魁;王朝果,金属学报,18(1982) ,592．
3 Che Guangcan (车广灿), Proc. of Beijing Int. Symp. on Hydrogen Systems, Pergamon Press New York, 1985． p. 56． |
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