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Stability and Phase Transformations of Icosahedral Phase in a 41.5Zr41.5Ti17Ni Alloy

Published online by Cambridge University Press:  31 January 2011

S. Yi  and
D. H. Kim
S. Yi
Affiliation:
Center for Noncrystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul, Korea
D. H. Kim*
Affiliation:
Center for Noncrystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Phase stability and transformations of the icosahedral phase (I-phase) in a 41.5Zr41.5Ti17Ni alloy were investigated using melt-spun ribbons and arc-melted bulk samples. A perfect I-phase can be formed directly from liquid through the melt-spinning technique. The I-phase formed in the ribbon is thermodynamically stable and transforms to W-phase, a 1/1 rational approximant above 565 °C. Formation of the perfect I-phase during annealing treatment of the arc-melted sample is very sluggish. Various types of approximants exist as intermediate states for the transformation of crystalline phases to a perfect I-phase.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 4 , April 2000 , pp. 892 - 897
Copyright
Copyright © Materials Research Society 2000

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