Kinetics of Isothermal Phase Transformations by Phase-Field Simulations: An Analogy between the Peritectic and Monotectic Systems |
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| Journal | Defect and Diffusion Forum (Volumes 297 - 301) |
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| Volume | Diffusion in Solids and Liquids V |
| Edited by | Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado |
| Pages | 1152-1159 |
| DOI | 10.4028/www.scientific.net/DDF.297-301.1152 |
| Citation | G. Boussinot et al., 2010, Defect and Diffusion Forum, 297-301, 1152 |
| Online since | April, 2010 |
| Authors | G. Boussinot, Efim A. Brener, D.E. Temkin |
| Keywords | Liquid Film Migration, Monotectic Phase Diagram, Peritectic Phase Diagram, Phase Field Modellig, Triple Junction |
| Abstract | We present phase-field simulations of isothermal phase transformations in the peritectic system below and above the peritectic temperature TP , and in the monotectic system below the monotectic temperature TM. We focus particularly on the Liquid-Film-Migration (LFM) mechanism, which appears to be the generic process for phase transformations above TP . Below TP , we obtain an assymetric LFM, suggesting the existence of a doublon structure in free space. In the monotectic system, the transformation from a liquid L1 to a solid+liquid L2 mixture proceeds via the migration of a L2 film, which is the analogous of the LFM process. When the metastable state consists of a liquid-liquid mixture, a dendritic-like solidification is obtained. |
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