Article ID Journal Published Year Pages File Type
7955959 Calphad 2014 5 Pages PDF
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 Gd55−xTixAl25Cu20 the primary solidifying phase changes from Gd2CuAl (x=0) toward α-Ti (x≥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 Gd55−xTixAl25Cu20 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.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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