Sn-Co合金热处理过程中的CoSn2→CoSn4相变

doi:10.13251/j.issn.0254-6051.2021.04.003

金属热处理 ›› 2021, Vol. 46 ›› Issue (4): 16-19.DOI: 10.13251/j.issn.0254-6051.2021.04.003

Sn-Co合金热处理过程中的CoSn₂→CoSn₄相变

吕冠辰, 梁文雷, 索玉松, 李磊

东北大学材料电磁过程研究教育部重点实验室, 辽宁沈阳 110819

收稿日期:2020-10-02 出版日期:2021-04-25 发布日期:2021-05-08
通讯作者: 李磊,副教授,博士生导师,E-mail:lilei@epm.neu.edu.cn
作者简介:吕冠辰(1995—),男,硕士研究生,主要研究方向为Sn-Co合金组织及相变,E-mail:1390025139@qq.com。
基金资助:
国家自然科学基金(51874092);中央高校基本科研业务费(N180905009)

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

Lü Guanchen, Liang Wenlei, Suo Yusong, Li Lei

Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang Liaoning 110819, China

Received:2020-10-02 Online:2021-04-25 Published:2021-05-08

摘要/Abstract

摘要： 对Sn-1.3wt%Co合金进行215 ℃下保温5、10、15 min并淬火的热处理,借助光学显微镜、扫描电镜和能谱仪研究了原始CoSn₂相的相变产物和形貌变化。结果发现:热处理导致Sn-1.3wt%Co合金发生了CoSn₂→CoSn₄相变;原始CoSn₂相局部溶解且生成的CoSn₄相相较于原始CoSn₂相位置有所扩展;两相相似的晶体结构和原子排列是CoSn₂相易转变为CoSn₄相的重要原因。

关键词: Sn-Co合金, 热处理, CoSn₂相, CoSn₄相, 固态相变

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

中图分类号:

TG111.5

吕冠辰, 梁文雷, 索玉松, 李磊. Sn-Co合金热处理过程中的CoSn₂→CoSn₄相变[J]. 金属热处理, 2021, 46(4): 16-19.

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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Sn-Co合金热处理过程中的CoSn₂→CoSn₄相变

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

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