退火对快淬法制备的LaNi_(4.25)Al_(0.75)合金组织和储氢性能的影响  

Effects of annealing treatment on structure and hydrogen storage properties of melt-spun LaNi_4.25 Al_0.75 alloy

作　　者：曹大力[1] 陈德敏[2] 孙文声[2] 吕曼祺[2] 杨柯[2] 

机构地区：[1]沈阳化工学院材料科学与工程学院,辽宁沈阳110142 [2]中国科学院金属研究所,辽宁沈阳110021

出　　处：《材料热处理学报》2010年第3期21-24,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50276063)

摘　　要：采用熔体旋淬法制备了LaNi4.25Al0.75合金,用XRD、SEM及吸氢PCT曲线(压力-组成等温线)和动力学测试等方法,研究了退火处理对合金结构和储氢性能的影响。XRD测试结果表明,退火后,合金保持CaCu5结构,但晶粒变大。PCT和动力学测试结果表明,经过退火处理的合金与快淬态相比,吸氢量增加,吸氢平台变宽,吸氢速度变快。The effects of annealing treatment on structure and hydrogen storage properties of melt-spun LaNi4.25 Al0.75 alloy were investigated by means of XRD, SEM,hydrogen absorption PCT（PC isotherms）and kinetic measurement. XRD results show that the alloy retains CaCu5-type hexagonal structure after annealing treatment, but the particle size becomes larger. The results of PCT and kinetics tests reveal that short-time annealing treatment can improve hydrogen absorption capacity, hydrogen absorption rate and widen the plateau region for melt-spun LaNi4.25 Al 0.75 alloy.

关 键 词：LaNi4.25Al0.75 储氢合金 熔体旋淬 退火 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TK91[金属学及工艺—金属材料]