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Crystal Structure and Morphology of Hydrogen Absorbing Alloys with BCC Structure

Published online by Cambridge University Press:  11 February 2011

Akiba E. ,
Enoki H.  and
Nakamura Y.
Akiba E.
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Central 5, 1–1–1 Higashi, Tsukuba, Ibaraki 305–8565, Japan
Enoki H.
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Central 5, 1–1–1 Higashi, Tsukuba, Ibaraki 305–8565, Japan
Nakamura Y.
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Central 5, 1–1–1 Higashi, Tsukuba, Ibaraki 305–8565, Japan
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Abstract

Hydrogen absorbing alloys with BCC (body centered cubic) structure such as Ti-V-Mn, Ti-V-Cr and Ti-V-Cr-Mn systems were proposed and named as “Laves phase related BCC solid solution” by Akiba in 1993. Since our reports, many researchers have developed BCC hydrogen absorbing alloys. These alloys have higher hydrogen capacity (about 2.8 mass% at present) than conventional intermetallic compounds. Many efforts have been made to increase hydrogen capacity of the alloys but fundamental studies were a few. Crystal structure and morphology of the BCC alloys that are keys to understand BCC hydrogen absorbing alloys are reviewed.

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