Numerical Prediction of Eutectic Temperature Using a Multi-phase-Field Model

作者：Ode Machiko^*; Sasajima Naohiko; Yamada Yoshiro; Bloembergen Pieter; Onodera Hidehiro

来源：International Journal of Thermophysics, 2011, 32(11-12): 2610-2622.

DOI：10.1007/s10765-011-1089-5

• Eutectic solidification and melting
• Fixed points
• Microstructure simulation
• Phase-field model

To evaluate the reliability of metal-carbon eutectic systems as fixed points for the next generation of the international temperature scale, the effect of the eutectic microstructure on the temperature at the solid/liquid (s/l) interface during solidification and melting is preliminarily investigated using a multi-phase-field model. First, the effects of furnace temperature, lamellar spacing, and interface energy on the average temperature of the s/l interface are studied in the solidification process. With increased furnace undercooling, the s/l interface temperature was found to decrease. Calculated eutectic microstructures are then adopted as initial conditions for a melting simulation. The interface undercooling during melting is observed to be smaller than that observed during solidification. This difference in interface undercooling is attributed to the solute/solvent concentration profiles in the liquid phase near the s/l interface being different for melting and solidification.

• 出版日期2011-12