Optimization and Calculation of the Al-Be-Si System

Abstract

Abstract: Lattice stability of Be is estimated,and interaction parameters for the liquids in the Al-Be and Be-Si systems are obtained using phase dia- gram data from literatures.Using the obtained parameters and the lattice stabilities of Al and Si given in the literatures,the Al-Be and Be-Si phase diagrams are calculated.By means of Kohler's for- mula the Gibbs energy for the liquid phase in the Al-Be-Si ternary system is extrapolated.The calcu- lation shows that no excess ternary term is necessa- ry for the thermodynamic description of the system. The liquidus projection,isothermal section at 1273 K,as well as vertical sections at 94 and 88 wt-% Al and 2 wt-% Be are calculated.The calcu- lated results are in reasonable agreement with the experimental data available.

Key words: thermodynamics, calculation, aluminium, beryllium, silicon, phase diagrams

DU Yong Q.S.Ran JIN Zhanpeng G.Effenberg DING Wei Dept.of Materials Science and Engineering,Central-South University of Technology,Changsha,410083,ChinaMax-Planck-Institut fur Metallforschung,Institut fur Werkstoffwissenschaften,Heisenbergstrasse 5,D-7000. Optimization and Calculation of the Al-Be-Si System[J]. J Mater Sci Technol, 1992, 8(3): 185-191.

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