(浙江大學 材料科學與工程系, 杭州 310027)
摘 要: 研究了新型鈦釩系貯氫電極合金Ti0.8Zr0.2V2.665Mn0.535Cr0.8Ni的相結(jié)構(gòu)、微觀組織及電化學性能。 XRD及EDS分析表明： 鑄態(tài)合金主要由C14 Laves相母體和樹枝晶的釩基固溶體相組成，同時由于成分偏析的緣故， 合金中還存在少量的TiNi基的第三相。熱處理使得合金中C14 Laves相及釩基固溶體相的晶胞參數(shù)和晶胞體積增大，促進合金成分的均勻化， 同時極大地改善了合金電極的綜合電化學性能。
關鍵字: 鈦；釩； 貯氫電極合金； C14 Laves相； TiNi相；電化學性能
electrode alloy
LI Rui, JIN Qin-wei, WANG Qi-dong
（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
