Rotating Directional Solidification of Ternary Eutectic Microstructures in Bi-In-Sn: A Phase-Field Study

被引:11
|
作者
Noubary, Kaveh Dargahi [1 ,2 ]
Kellner, Michael [1 ]
Nestler, Britta [1 ,2 ]
机构
[1] Karlsruhe Inst Technol KIT, Inst Appl Mat Mat Sci IAM CMS, Str Forum 7, D-76131 Karlsruhe, Germany
[2] Karlsruhe Univ Appl Sci, Inst Digital Mat Sci IDM, Willy Andreas Allee 19, D-76131 Karlsruhe, Germany
关键词
rotating directional solidification (RDS); phase-filed simulation; anisotropic interfacial energies; tilted lamellar growth; ternary eutectics; Bi-In-Sn; VELOCITY VARIATIONS; GROWTH; SIMULATIONS; EVOLUTION; DYNAMICS; CALIBRATION; LAMELLAR; PATTERN; MODEL; ANGLE;
D O I
10.3390/ma15031160
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
For the first time, the experimental processing condition of a rotating directional solidification is simulated in this work, by means of a grand-potential-based phase-field model. To simulate the rotating directional solidification, a new simulation setup with a rotating temperature field is introduced. The newly developed configuration can be beneficent for a more precise study of the ongoing adjustment mechanisms during temperature gradient controlled solidification processes. Ad hoc, the solidification of the ternary eutectic system Bi-In-Sn with three distinct solid phases alpha,beta,delta is studied in this paper. For this system, accurate in situ observations of both directional and rotating directional solidification experiments exist, which makes the system favorable for the investigation. The two-dimensional simulation studies are performed for both solidification processes, considering the reported 2D patterns in the steady state growth of the bulk samples. The desired alpha beta alpha delta phase ordering repeat unit is obtained within both simulation types. By considering anisotropy of the interfacial energies, experimentally reported tilted lamellae with respect to normal vectors of the solidification front, as well as predominant role of alpha beta anisotropy in tilting phenomenon, are observed. The results are validated by using the Jackson-Hunt analysis and by comparing with the existing experimental data. The convincing agreements indicate the applicability of the introduced method.
引用
收藏
页数:21
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