CoSn2→CoSn4 phase transformation of Sn-Co alloy during heat treatment

doi:10.13251/j.issn.0254-6051.2021.04.003

Abstract

Abstract: Phase transformation products and morphologies of the original CoSn₂ phase in Sn-1.3wt%Co alloy which was heat treated at 215 ℃ for 5, 10, 15 min and water quenched respectively were studied by means of OM, SEM and EDS. The results show that CoSn₂→CoSn₄ phase transformation occurs due to the heat treatment. The original CoSn₂ phase is partially dissolved and the position of resulting CoSn₄ phase is somewhat expanded relative to that of the original CoSn₂ phase. The similarity of crystal structure and atomic arrangement of the two phases are the important reasons for the transformation of CoSn₂ phase into CoSn₄ phase.

Key words: Sn-Co alloy, heat treatment, CoSn₂ phase, CoSn₄ phase, solid-state phase transformation

CLC Number:

TG111.5

Lü Guanchen, Liang Wenlei, Suo Yusong, Li Lei. CoSn₂→CoSn₄ phase transformation of Sn-Co alloy during heat treatment[J]. Heat Treatment of Metals, 2021, 46(4): 16-19.

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CoSn₂→CoSn₄ phase transformation of Sn-Co alloy during heat treatment

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