中文摘要：

采用中频感应真空熔炼（IM）和放电等离子烧结（SPS）工艺制备La0．80Mg0．20Ni3.75合金。XRD分析表明，这两种工艺制备的合金均含有LaNi5和（La，Mg）2Ni，主相，而中频感应真空熔炼法制备的合金（IMLa合金）还含有（La，Mg）Nis相，放电等离子烧结法制备的合金（SPSLa合金）还含有Ni及La0．80Mg0．20Ni3.75电化学性能测试结果表明，作为镍氢电池负极材料，IMLa合金的放电容量、损耗角及极限电流密度均较大；而SPSLa合金的循环性能较好，这归因于SPSLa合金晶粒细小，组织均匀，Ni和LazMg17相弥散分布，可减弱其电极脱落程度。

英文摘要：

La0.80Mg0.20Ni3.75 alloy was prepared by intermediate frequency induction vacuum melting （IM） or spark plasma sintering （SPS）. The results from XRD show that both the alloys prepared by the two technologies contain the main phases of LaNi5 and （La, Mg）2Ni7. In addition, the alloy from IM technology （IMLa alloy） contains （La, Mg）Ni3 phase,and the alloy from SPS technology （SPSLa alloy） contains Ni and La2Mg17 phases. The results of electrochemical performance test indicate that IMLa alloy is of higher discharge capacity, loss angle and limiting current density as anode materials of Ni-MH batteries,but the cycle performance of SPSLa alloy is better. SPSLa alloy is of fine grains, homogeneous mierostructure and dis- persive Ni and La2Mg17 phases,so its electrode shedding degree weakens and cycle stability improves.