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Effect of Ti Substitution on the Microstructure and Properties of Zr–Mn–V–Ni AB2 Type Hydride Electrode Alloys

Published online by Cambridge University Press:  31 January 2011

Xueyan Song ,
Ze Zhang ,
Xiaobin Zhang ,
Yongquan Lei  and
Qidong Wang
Xueyan Song
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China and Beijing Laboratory of Electron Microscopy, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, 100080, Beijing, China
Ze Zhang
Affiliation:
Beijing Laboratory of Electron Microscopy, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, 100080, Beijing, China
Xiaobin Zhang
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
Yongquan Lei
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
Qidong Wang
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China
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Abstract

The electrochemical capacity, hydrogen absorbed/desorbed activation properties of alloy Zr(Mn0.1V0.3Ni0.6)2 were improved after Ti substitution for the Zr. The microstructure of Zr1xTix (Mn0.1V0.3Ni0.6)2 (x = 0, 0.5) alloys was analyzed by x-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive spectrum (EDS) analysis. A systematic structural analysis shows that there are two phases in the Ti-substituted alloy of Zr0.5Ti0.5(Mn0.1V0.3Ni0.6)2: C14 Laves phase and Ti-containing “premartensite” R phase of Ti0.8Zr0.2Ni. The improvement of electrochemical properties of alloy Zr(Mn0.1V0.3Ni0.6)2 after Ti substitution can be attributed to the Ti substitution for Zr sites in C14 Laves phase, the formation of Ti0.8Zr0.2Ni R-phase, and disappearance of Zr–Ni binaries.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 4 , April 1999 , pp. 1279 - 1285
Copyright
Copyright © Materials Research Society 1999

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