快淬La-Mg-Ni系贮氢电极合金的结构与电化学性能  

The Structures and Electrochemical Properties of La-Mg-Ni System Hydrogen Storage Electrode Alloy

作　　者：董小平[1] 张羊换[1] 冯猛[2] 王国清[2] 王新林[2] 

机构地区：[1]内蒙古科技大学材料工程学院,包头014010 [2]钢铁研究总院功能材料研究所,北京100081

出　　处：《材料导报》2005年第4期124-127,共4页Materials Reports

基　　金：国家自然科学基金项目(50071050);国家自然科学重点基金项目(50131040)

摘　　要：铸态及快淬态 La_2Mg(Ni_(0.85)Co_(0.15))_9Cr_(0.1)贮氢电极合金主要由(La,Mg)Ni_3相(PuNi_3型结构),LaNi_5相以及少量的 LaNi_2相组成,各相的含量与淬速有关。与铸态合金相比较,快淬态合金放电平台电压降低,快淬使合金的循环寿命都有不同程度的提高。铸态和快淬态合金均具有良好的活化性能。La_2Mg(Ni_(0.85)Co_(0.15))_9Cr_(0.1) hydrogen storage electrode alloy prepared by casting and rapid quench- ing consists of(La,Mg)Ni_3 phase(PuNi_3-type structure),LaNi_5 phase and a small amount of LaNi_2 phae.The rela- tive amount of each phase in the alloys depends on the quenching rate.Compared with as-cast alloy,discharge plateau voltage decreases in the as-quenched alloys.The cycle lives of as-quenched alloys increase slightly with the increase of quenching rate.The as-cast and quenched alloys have an excellent activation performance.

关 键 词：贮氢电极合金 电化学性能 快淬 结构 i系 Mg La 电压降低 放电平台 循环寿命 活化性能 铸态 相组成 

分 类 号：TG139.7[一般工业技术—材料科学与工程] S858.312.4[金属学及工艺—合金]