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

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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.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-Ku, Sendai, 980-8577, Japan

    Dmitri V. Louzguine & Akihisa Inoue

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  1. Dmitri V. Louzguine
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  2. Akihisa Inoue
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Louzguine, D.V., Inoue, A. Multicomponent metastable phase formed by crystallization of Ti–Ni–Cu–Sn–Zr amorphous alloy. Journal of Materials Research 14, 4426–4430 (1999). https://doi.org/10.1557/JMR.1999.0599

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  • DOI: https://doi.org/10.1557/JMR.1999.0599

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