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Crystallization of Sputter Deposited Ti-Al Amorphous Alloy

Published online by Cambridge University Press:  15 February 2011

M. Ohnuma ,
T. Abei  and
H. Onodera
M. Ohnuma
Affiliation:
National Research Institute for Metals, Tsukuba 305, Japan, ohnuma@nrim.go.jp
T. Abei
Affiliation:
National Research Institute for Metals, Tsukuba 305, Japan, ohnuma@nrim.go.jp
H. Onodera
Affiliation:
National Research Institute for Metals, Tsukuba 305, Japan, ohnuma@nrim.go.jp
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Abstract

The crystallization process of Ti-Al amorphous alloy has been studied by X-ray diffraction, small-angle neutron scattering and high resolution electron microscopy. In the early stage of crystallization of a thick sample with 55at%Al, a metastable hcp(α, α2) phase appeares. For a thin sample with 52at%Al, a new metastable phase having primitive tetragonal symmetry is found in the early stage of crystallization. The lattice parameter of this tetragonal phase is a=c=0.69nm. The prototype structure which has the same atomic arrangement as this phase is only Cu4Pd type structure (P42/m) in the Peason's Handbook.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 209
Copyright
Copyright © Materials Research Society 1996

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