(1. 济南大学 化学化工学院,济南 250022;
2. 中国科学院 上海微系统与信息技术研究所 能源室,上海 200050)
摘 要: 采用XRD、 SEM和PCT法研究Mo取代TiCr1.8合金中的部分Cr对其结构和储氢性能的影响。 XRD测试结果表明, 随着合金中Mo取代Cr的量的增加, 合金的相组成首先转变为MoCr体心立方(BCC)相与Laves相共存, Laves相的含量逐渐降低; 当Mo含量超过一定量时, 合金的相组成转变为MoCr BCC相与微量的α-Ti相共存; MoCr BCC相的晶胞参数随合金中Mo含量的增加而增大。 合金的压力-组分-温度(PCT)测试结果表明, 合金的吸氢量随合金中Mo含量的增加而减少。
关键字: TiCr基储氢合金; 压力-温度-组成测试; 储氢性能
(1. School of Chemistry and Chemical Engineering, Ji'nan University,
Ji'nan 250022, China;
2. Department of Energy Science and Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)
Abstract: The influences of partial substitution of Mo for Cr of TiCr1.8 alloys on structure and hydrogen storage characteristics were investigated by means of XRD, SEM and PCT. X-ray diffraction (XRD) tests show that MoCr body centered cubic (BCC) phase and Laves phase coexist in the alloys despite the decrease of Laves phase content. And there exist MoCr BCC phase and α-Ti phase in the alloys when Mo content surpasses certain value. The crystal cell parameters of MoCr BCC phase increase with increasing Mo content. Pressure-composition-temperature (PCT) tests reveals that the hydrogen absorption content decreases with increasing Mo content.
Key words: TiCr-based hydrogen storage alloys; pressure-composition- temperature (PCT); hydrogen storage performances