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Multicomponent metastable phase formed by crystallization of Ti–Ni–Cu–Sn–Zr amorphous alloy

Published online by Cambridge University Press:  31 January 2011

Dmitri V. Louzguine  and
Akihisa Inoue
Dmitri V. Louzguine
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-Ku, Sendai 980–8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-Ku, Sendai 980–8577, Japan
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Abstract

Crystallization of the Ti45Ni20Cu25Sn5Zr5 alloy has been studied by means of scanning differential calorimetry, x-ray diffraction, and conventional and high-resolution transmission electron microscopy. The first stage at about 750–800 K is related to the primary crystallization of the Ti8Ni3Cu3SnZr metastable phase having Im3m body-centered-cubic structure with a lattice parameter of a = 0.3069 nm followed by precipitation of the secondary dotlike phase precipitates on its boundaries. The activation energy for the first exothermic reaction determined by Kissinger analysis was found to be 310 kJ/mol. CuTi, Ni2TiZr, and an unknown phase are formed during long-term annealing at high (more than 850 K) temperature.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4426 - 4430
Copyright
Copyright © Materials Research Society 1999

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References

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