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Ti-Zr-Ni Quasicrystals: Structure and Hydrogen Storage

Published online by Cambridge University Press:  15 February 2011

R. M. Stroud ,
A. M. Viano ,
E. H. Majzoub ,
P. C. Gibbons  and
K. F. Kelton
R. M. Stroud
Affiliation:
Washington University, St. Louis, Missouri, 63130USA
A. M. Viano
Affiliation:
Washington University, St. Louis, Missouri, 63130USA
E. H. Majzoub
Affiliation:
Washington University, St. Louis, Missouri, 63130USA
P. C. Gibbons
Affiliation:
Washington University, St. Louis, Missouri, 63130USA
K. F. Kelton
Affiliation:
Washington University, St. Louis, Missouri, 63130USA
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Abstract

Titanium-based icosahedral phases constitute the second largest class of quasicrystals. In contrast with other Ti-based icosahedral phases (i-phases), Ti-Zr-Ni i-phases are well ordered and their formation is inhibited by the presence of Si and O, elements that stabilize the Ti-3d transition metal quasicrystals. We present x-ray and DSC data that suggest that Ti-Zr-Ni i-phases form a different class of titanium-based quasicrystals that are closely related to the MgZn2 Laves phase. The DSC data also suggest that the i-phase may be stable in these alloys. The ability of Ti-Zr-Ni i-phases to absorb up to 62 atomic % of hydrogen is presented and discussed. This opens new avenues of investigation of the structure and dynamics of quasiperiodic phases using elastic and inelastic neutron scattering and nuclear magnetic resonance and may point to potential uses for quasicrystals in hydrogen storage applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 255
Copyright
Copyright © Materials Research Society 1996

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