合金化对ZrMn2基Laves相贮氢合金相组成的影响

中国有色金属学报, 2002, 12(5): 897-901.

合金化对ZrMn2基Laves相贮氢合金相组成的影响

张文魁 ^1, , 马淳安 ^2, , 黄辉 ^3, , 杨晓光 ^4, , 雷永泉 ^5, , 王启东 ^6,

1.浙江工业大学应用化学系,杭州,310014

2.浙江工业大学应用化学系,杭州,310014

3.浙江工业大学应用化学系,杭州,310014

4.浙江大学材料与化工学院,杭州,310027

5.浙江大学材料与化工学院,杭州,310027

6.浙江大学材料与化工学院,杭州,310027

基金项目: 国家自然科学基金(59601006)

关键词： Laves相 , 贮氢合金 , 相组成 , ZrMn2基

Effect of alloying elements on phase composition of ZrMn2-based Laves phase hydrogen storage alloys

研究了Ni、v、Cr、Co、Fe、Cu和Ti等合金化元素取代ZrMn2基Laves相贮氢合金的B侧或A侧对合金相组成的影响.结果表明,采用不同的元素对A侧或B侧进行部分取代,将引起ZrMn2基合金相组成的变化.采用Ni取代Mn后,ZrMn2合金的主相结构转变为C15型Laves相,表明Ni为C15相稳定元素.对Zr-Mn-Ni三元合金,V为C14相稳定元素,而Co、Fe、Cu则为C15相稳定元素.取代量较少时,Cr为C15相稳定元素,取代量增加时,C15相稳定作用减弱.Ti元素为C14相稳定元素,Ti对Zr的部分取代将导致合金主相结构转变为C14型Laves相.合金化元素对ZrMn2合金的相组成的影响与元素的电子浓度和原子尺寸不同有关.

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