(浙江大学 材料科学与工程系, 杭州 310027)
摘 要: 研究了新型钛钒系贮氢电极合金Ti0.8Zr0.2V2.665Mn0.535Cr0.8Ni的相结构、微观组织及电化学性能。 XRD及EDS分析表明： 铸态合金主要由C14 Laves相母体和树枝晶的钒基固溶体相组成，同时由于成分偏析的缘故， 合金中还存在少量的TiNi基的第三相。热处理使得合金中C14 Laves相及钒基固溶体相的晶胞参数和晶胞体积增大，促进合金成分的均匀化， 同时极大地改善了合金电极的综合电化学性能。
关键字: 钛；钒； 贮氢电极合金； C14 Laves相； TiNi相；电化学性能
electrode alloy
（Department of Materials Science and Engineering,
Zhejiang University, Hangzhou 310027, China）
Abstract:The phase structure, microstructure and electrochemical properties of the new type TiV-based hydrogen storage electrode alloy Ti0.8Zr0.2V2.665Mn0.535Cr0.8Ni were studied. It is found by XRD and EDS analysis that the as-cast alloy mainly consists of the C14 Laves phase matrix and the dendritic V-based solid solution phase. Besides, a small amount of third TiNi-based phase precipitates in the as-cast alloy due to the compositional segregation during solidification. Annealing treatment leads to the increaseing in lattice parameters and unit cell volumes of both the C14 Laves phase and the V-based solid solution phase, makes the alloy composition more homogeneous and improves greatly the overall electrochemical properties of the alloy electrode.
Key words: Ti; V; hydrogen storage electrode alloy; C14 Laves phase; TiNi-based phase; electrochemical pr
