期刊
SCRIPTA MATERIALIA
卷 189, 期 -, 页码 42-47出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.07.057
关键词
Solidification microstructure; Alloys; Crystal defects; Liquid diffusion
类别
资金
- Natural Science Foundation of China [51871118]
- 2018 joint Foundation of Ministry of Education for Equipment Pre-research [6141A020332]
- key research and development plan of Gansu Province [18YF1GA102]
- Fundamental Research Funds for the Central Universities [lzujbky-2019-sp03]
- fund of Science and Technology Project of Lanzhou City [2019-1-30]
A new formation mechanism of micropores whose radii are approximately 1 mu m is investigated during solidification of Sn-Ni alloy through the in-situ observation by confocal laser scanning microscope. A series of liquid lines which are closely related to the stability of the growing L/Ni3Sn2 interface were formed during solidification, then, these liquid lines decomposed into different rows of liquid droplets by Rayleigh instability in solid Ni3Sn2 phase. The relationship between the formation of the micropores and the liquid droplets is confirmed. In addition, the distribution of the radii of the micropores agrees with the prediction of the Rayleigh instability theory. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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