摘要
测定了LaNi5 -xAlx(x =0 ,0 1,0 2 ,0 3 )的氘化与去氘化的动力学参数 ,评价了铝含量对LaNi5 -xAlx 合金的氘化与去氘化动力学函数的影响。研究结果表明 ,铝含量不改变合金的氘化与去氘化的反应级数 ;反应速率常数随x的增加而减少 ;活化能随x的增加而增加 ;氘化与去氘化反应级数a (由气相氘压决定 )和b (由固相氘浓度决定 )分别为 2和 1及 0 5和 1。在α + β相域 ,氘化与去氘化反应的速控步骤分别为氘化物的成核
Kinetics parameters of LaNi 5- x Al x (x =0, 0 1, 0 2, 0 3) alloys were measured. The influence of aluminium content ( x ) on deuterating dedeuterating kinetic function of LaNi 5- x Al x was assessed under isothermal and isochoric condition. The results show that x does not change deuterating dedeuterating reaction order. Activation energy increases while the rate constant decreases with x increasing. Deuterating and dedeuterating reaction order a (with respect to deutertium pressure) and b (with respect to deuterium content) are 2 and 1, 0 5 and 1, respectively. The rate controlling steps of deuterating and dedeuterating reaction in α+β region are assumed to the nucleation growth and diffusion in deuterium of deuteride respectively.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2001年第2期121-124,共4页
Journal of the Chinese Society of Rare Earths
基金
中国工程物理研究院基金资助项目 !(2 0 0 0 0 5 5 6)
