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Hydrogen absorption of C14 Laves NiTiZr-NiVNb pseudo-binary alloys

Published online by Cambridge University Press:  26 February 2011

Kazuhiro Ishikawa ,
Shintaro Noda ,
Kiyonori Suzuki  and
Kiyoshi Aoki
Kazuhiro Ishikawa
Affiliation:
Department of Materials Science, Kitami Institute of Technology, Koen-cho 165, Kiatami, Hokkaido 090–8507, Japan
Shintaro Noda
Affiliation:
Graduate Student, Kitami Institute of Technology
Kiyonori Suzuki
Affiliation:
School of Physics and Materials Engineering, Monash University, Clayton, Victoria 3800, Australia
Kiyoshi Aoki
Affiliation:
Department of Materials Science, Kitami Institute of Technology, Koen-cho 165, Kiatami, Hokkaido 090–8507, Japan
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Abstract

Hydrogen absorption and desorption properties of C14 Laves NiTiZr-NiVNb and NiTiZr-NiVZr pseudo-binary alloys were investigated by using the Sieverts' apparatus, XRD and the hydrogen analyzer. The hydrogen capacity and the 50% hydrogen desorption temperature, Td, of the C14 Laves NiTiZr alloy is 1.5 (H/M) and 850 K, respectively. On the other hand, the hydrogen capacity of the C14 NiVNb alloy is 0.2 H/M. In the Ni(TiZr)1−x(VNb)x pseudo-binary system, the hydrogen capacity of the alloys is decreased with increasing x, but the 50% hydrogen desorption temperature is almost constant. The substitution of VNb reduces the hydrogen absorption capacity of the C14 Laves NiTiZr alloy. The hydrogen desorption temperature of Ni(Ti1−xVx)Zr alloy is reduced to 580 K without serious decrease of the hydrogen capacity with increasing x.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 801: Symposium BB – Materials and Technologies for a Hydrogen Economy , 2003 , BB3.2
Copyright
Copyright © Materials Research Society 2004

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References

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