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| ON THE SYNTHESIS BY REDUCTION-DIFFUSION AND THE PROPERTIES OF LaNi_(5-x)Cu_x ALLOYS |
| ZHENG Chaogui; DONG Cheng; QIAN Jiuxin; YE Yupu (Department of Chemistry; Peking University) (Manuscript received 8 September; 1983; revised manuscript 7 February; 1984) |
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Cite this article:
ZHENG Chaogui; DONG Cheng; QIAN Jiuxin; YE Yupu (Department of Chemistry; Peking University) (Manuscript received 8 September; 1983; revised manuscript 7 February; 1984). ON THE SYNTHESIS BY REDUCTION-DIFFUSION AND THE PROPERTIES OF LaNi_(5-x)Cu_x ALLOYS. Acta Metall Sin, 1984, 20(6): 458-464.
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Abstract An investigation was made of the technological process for synthesis of LaNi_(5-x)Cu_x (x=0—5) alloys by reduction-diffusion, especially detailed the proportion and grain size of starting materials, the temperature and time of reaction, etc. A favourable process was developed that the samples of LaNi_(5-x)Cu_x alloy series of the CaCu_5 structure may be prepared by direct synthesis of Cu and Ni powders under reduction-diffusion at 825℃. Referred to the similar process, the related intermetallic compounds LaNi_4Zn, LaNi_(3.75)Al_(1.25) and (La_(0.8)Ti_(0.2))Ni_5 were synthesized conveniently. The stability of LaNi_(5-x)Cu_x (x=0—5) alloy specimens immersed in acids, alkalies and other various media, as well as their catalytic activity in ammonia synthesis under normal temperature and pressure were also studied and compared individually.
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Received: 18 June 1984
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