Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7955959 | Calphad | 2014 | 5 Pages |
Abstract
Phase equilibria of the quaternary Gd-Ti-Al-Cu system have been studied with particular respect to solidification and phase separation phenomena in metallic glasses. Along the section Gd55âxTixAl25Cu20 the primary solidifying phase changes from Gd2CuAl (x=0) toward α-Ti (xâ¥10) with rising Ti-fraction x. This is accompanied by an upturn of the liquidus temperature from TL=745 °C to TL>1100 °C. The miscibility gap predicted from thermodynamic calculations for Gd55âxTixAl25Cu20 melts at intermediate Ti-fractions was not verified experimentally. Unlike binary Gd-Ti melts, levitated Gd-Ti-Al-Cu droplets do not exhibit liquid phase separation features after quenching from different holding temperatures, even at high melt undercooling up to 200 K prior to solidification.
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Physical Sciences and Engineering
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Authors
S. Schmitz, H.-G. Lindenkreuz, W. Löser, B. Büchner,