硼对低钴AB_5型贮氢合金循环寿命的影响  

Effect of Boron Additive on the Cycle Life of Low-Co AB_5-Type Hydrogen Storage Alloy

作　　者：张羊换[1] 陈梅艳[2] 王新林[1] 王国清[2] 祁焱[1] 郭世海[1] 

机构地区：[1]钢铁研究总院,北京100081 [2]包头钢铁学院,内蒙古包头104010

出　　处：《稀有金属材料与工程》2005年第2期212-216,共5页Rare Metal Materials and Engineering

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

摘　　要：为了提高低钴 AB_5 型贮氢合金的电化学循环稳定性,在低钴 AB_5 型贮氢合金中加入微量的硼,用真空快淬工艺制备了稀土系低钴 AB_5型 MmNi_(3.8)Co_(0.4)Mn_(0.6)Al_(0.2)Bx_(x=0, 0.1, 0.2, 0.3, 0.4)贮氢合金,分析测试了铸态及快淬态合金的电化学性能及微观结构,研究了硼对铸态及快淬态合金微观结构及循环寿命的影响。结果表明,硼能大幅度提高铸态及快淬态低钴 AB5型贮氢合金的电化学循环稳定性,但其作用机理是完全不同的。In order to modify its cycle stability, a trace amount of boron was added in low-Co AB(5)-type hydrogen storage alloy. The low-Co AB(5)-type MmNi(3.8)CO(0.4)Mn(0.6)Al(0.2)B(x)(x=0, 0.1, 0.2, 0.3, 0.4)hydrogen storage alloys were prepared by cast and rapid quenching. The microstructures and electrochemical performances of the as-cast and quenched alloys were analyzed and measured. The effect of boron additive on the microstructures and cycle lives of the alloys were investigated comprehensively. The experimental results show that the addition of boron dramatically enhances the cycle lives of the as-cast and quenched low-Co AB(5)-type hydrogen storage alloys, whereas the action mechanism of boron is completely different.

关 键 词：低钴AB5型贮氢合金 铸态及快淬态 循环寿命 

分 类 号：TG139.7[一般工业技术—材料科学与工程]