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In situ X-ray and neutron powder diffraction study of LaNi5-x Snx–H systems

Published online by Cambridge University Press:  01 February 2011

Yumiko Nakamura ,
Robert C. Bowman Jr  and
Etsuo Akiba
Yumiko Nakamura
Affiliation:
National Institute of Advanced Industrial Science and Technology, AIST Central 5, 1–1–1, Higashi, Tsukuba, Ibaraki, 305–8565, Japan
Robert C. Bowman Jr
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, Mail Stop 79–24, 4800 Oak Grove Dr., Pasadena, CA 91109–8099, USA
Etsuo Akiba
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

We have studied structural change and lattice strain formation during absorption and desorption of hydrogen (deuterium) by high purity LaNi5-x Snx alloys (x = 0.22, 0.25) using in situ X-ray and neutron diffraction along with simultaneously measuring the P-C isotherms. From profile analysis of the X-ray diffraction data, lattice parameter and lattice strain in each hydriding state are evaluated. In situ neutron diffraction data provided hydrogen occupation changing with hydrogen content. Significant lattice contract and strain formation were observed in the hydride phase in desorption. This behavior was related with decrease in hydrogen occupation in the hydride phase revealed from the neutron diffraction data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 837: Symposium N – Materials for Hydrogen Storage – 2004 , 2004 , N1.8
Copyright
Copyright © Materials Research Society 2005

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References

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