Cluster-based composition rule for Laves phase-related BCC solid solution hydrogen storage alloys  

作　　者：WANG Qing CHEN Feng WU Jiang QIANG Jianbing DONG Chuang ZHANG Yao XU Fen SUN Lixian 

机构地区：[1]State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China [2]International Center of Materials Physics, Metals Research Institute, Chinese Academy of Sciences, Shenyang 110015, China Materials & Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China Materials & Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China Materials & Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

出　　处：《Rare Metals》2006年第z1期252-255,共4页稀有金属（英文版）

基　　金：This project was financially supported by the National Natural Science Foundation of China (No.50401020);by a Joint Research Funding of Dalian University of Technology and Dalian Institute of Chemical Physics.

摘　　要：A new cluster line approach for the composition rule of Laves phase-related BCC solid solution hydrogen-storage alloys was presented. The cluster line in a ternary phase diagram refers to a straight composition line linking a specific binary cluster to the third element. In the Laves phase-related BCC solid solution alloy system such as Ti-Cr-V, Ti-Cr tends to form binary Cr2Ti Laves phase while Ti-V and Cr-V to form solid solutions. This Laves phase is characterized by a close-packing icosahedral cluster Cr7Ti6. A cluster line Cr7Ti6-V is then constructed in this system. Alloy rods with a diameter of 3 mm of compositions along this line were prepared by copper-mould suction method. The alloy structure is found to vary with the V contents. Furthermore, the P-C-T measurements indicate that the cluster-line (Cr7Ti6)1-xVx alloys have large hydrogen storage capacities.A new cluster line approach for the composition rule of Laves phase-related BCC solid solution hydrogen-storage alloys was presented. The cluster line in a ternary phase diagram refers to a straight composition line linking a specific binary cluster to the third element. In the Laves phase-related BCC solid solution alloy system such as Ti-Cr-V, Ti-Cr tends to form binary Cr2Ti Laves phase while Ti-V and Cr-V to form solid solutions. This Laves phase is characterized by a close-packing icosahedral cluster Cr7Ti6. A cluster line Cr7Ti6-V is then constructed in this system. Alloy rods with a diameter of 3 mm of compositions along this line were prepared by copper-mould suction method. The alloy structure is found to vary with the V contents. Furthermore, the P-C-T measurements indicate that the cluster-line (Cr7Ti6)1-xVx alloys have large hydrogen storage capacities.

关 键 词：Ti-Cr-V alloys composition rule CLUSTER hydrogen storage 

分 类 号：TG146.4[一般工业技术—材料科学与工程]