PHASE-DIAGRAMS OF AL-SI AND AL-GE SYSTEMS

Considering the contributions from the band and local mode frequencies , the temperature-and pressure-dependent mean-square displacement for Al-Si and Al-Ge solid solutions is quantitatively calculated to be sim ilar to that for matrix Al. Then, the concentration-dependence of the Debye temperature at higher and lower temperatures is estimated, the p ressure effect on the solidus curve is presented by applying Lindeman' s melting law to the Al-Si and Al-Ge alloy systems. The solidus curve obtained increases as a function of the pressure, and is in good agree ment with the observed tendency for these solid solutions. (C) 1998 El sevier Science B.V. All rights reserved.