https://scholars.lib.ntu.edu.tw/handle/123456789/64474
標題: | A simple approach toward quantitative phase field simulation for dilute-alloy solidification | 作者: | Shih, C.J. Lee, M.H. CHUNG-WEN LAN |
公開日期: | 2005 | 期: | 282 | 起(迄)頁: | 515-524 | 來源出版物: | Journal of Crystal Growth | 摘要: | We present a simple approach that could help quantitative phase field simulation for dilute-alloy solidification. The proposed approach mends the solute trapping problem by using a simple interface model (SIM), which requires only one free parameter. To test the feasibility of this model, a free dendritic growth from a small nucleus is simulated, and a good agreement with the anti-trapping current (ATC) model [Karma, Phys. Rev. Lett. 87 (2001) 115701] is obtained. By further studying the solute trapping effect during directional solidification, we find that the results give, with this model, a good thermodynamic consistence without solute trapping over two-order increment of the solidification speed and the interface thickness. Good agreement with the classical theory is obtained as well. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/87487 | DOI: | 10.1016/j.jcrysgro.2005.05.052 |
顯示於: | 化學工程學系 |
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