摘要
重点研究了热处理工艺对(LaNdPrMg)(NiCoAl)3.8合金相成分和电化学性能的影响。总结发现1323 K保温5 h急冷的热处理过程,在改善相成分方面,可以使合金中高容量的A5B19相丰度达到68%(质量分数),电化学性能测试表明,其最大放电容量达到400.9 mAh.g-1,电化学循环100周容量保持率达到82.44%。经分析认为,加热保温过程对改善储氢合金相结构的均匀性起到一定的作用,而急冷过程对改善储氢合金综合性能起到至关重要的作用。
The influence of heat-treatment on phase composition and electrochemical properties of（LaNdPrMg）（NiCoAl）3.8 alloy was researched.It was discovered that heating treatment process at 1323 K preserved 5 h and fast cooling could help to improve the phase composition so as to increase the high capacity A5B19-type phase abundance to 68%（mass fraction）.The result of electrochemical properties test showed that Cmax could increase to 400.9 mAh · g-1.Moreover,the cycling stability retained around 82.44% after 100 cycles.The heating process and keeping temperature had a certain effect in the improvement of phase structure uniformity.Moreover fast cooling process played an essential role in improving the hydrogen storage alloy overall performance.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2012年第2期236-241,共6页
Chinese Journal of Rare Metals
基金
国家科技部863课题(2007AA05Z106)资助项目
关键词
热处理工艺
退火
水淬
高丰度
A5B19
heat-treatment
annealing
water quenching
high abundance
A5B19
