In-situ analysis on formation of micropores by Rayleigh instability in solidification of Sn-Ni alloy

In-situ analysis on formation of micropores by Rayleigh instability in solidification of Sn-Ni alloy
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Sn-Ni合金凝固瑞利不稳定性微孔形成的原位分析

DOI:
10.1016/j.scriptamat.2020.07.057
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发表时间:
2020-12
期刊:
影响因子:
6
通讯作者:
Xu Yuanli
Xu Yuanli
中科院分区:
材料科学1区
文献类型:
--
作者:
Peng Peng;Yue Jinmian;Zhang Anqiao;Zhang Xudong;Xu Yuanli

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通过激光共聚焦扫描显微镜的原位观察,研究了锡镍合金凝固过程中半径约为1µm的微孔的形成机理。在凝固过程中形成了一系列与生长的L/Ni3Sn2界面的稳定性密切相关的液线,这些液线在固相Ni3Sn2相中由于瑞利不稳定性而分解成不同排的液滴。证实了微孔的形成与液滴之间的关系。此外,微孔半径的分布与瑞利不稳定性理论的预测一致。(C)2020 Acta Materialia Inc.由爱思唯尔有限公司出版。版权所有。
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.
DOI: 10.1007/bf02651956
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