LaNi_(3.5)合金的结构与储氢性能  

Structure and Hydrogen Storage Properties of LaNi_(3.5) Alloy

作　　者：柴玉俊[1] 王宁[1] 

机构地区：[1]河北师范大学,河北石家庄050016

出　　处：《稀有金属材料与工程》2010年第A01期24-26,共3页Rare Metal Materials and Engineering

摘　　要：采用电弧熔炼法合成LaNi3.5合金,在950℃、真空条件下对合金退火6和12h。用XRD、SEM、In-situ XRD、P-C Isotherm表征合金的形貌结构和储氢性能。结果表明,铸态LaNi3.5合金中除了存在Ce2Ni7相之外,还有一定量的其他相。热处理后合金更加均匀,Ce2Ni7相含量增加。60℃和3MPa条件下,LaNi3.5合金的吸氢量～0.35H/M,在第一次吸氢过程中,并未出现明显的两相平台。原位衍射测试结果表明,LaNi3.5合金吸氢后呈现明显的各相异性膨胀。LaNi35 alloy was prepared by arc melting method in Ar atmosphere and then annealed at 950 ℃for 6 h and 24 h in vacuum. It was characterized by XRD, SEM, PCT and in-situ XRD. The results show that other phase besides except Ce2Ni7 phase in the as-prepared. After annealing, the alloy was homogeneous and the content of Ce2Ni7 phase increased. The hydrogen absorption was -0.35 H/M under a hydrogen pressure of 3 MPa at 60℃ and no obvious flat plateau was observed in the first hydrogen absorption process. In-situ XRD results show that Ce2Ni7 phase presented obvious anisotropic expansion after hydrogenation.

关 键 词：金属合金 储氢性能 Ce2Ni7 

分 类 号：TG139.7[一般工业技术—材料科学与工程]