Thermally enhanced glass formation in multilayered Cu33Zr67 composite particles

Abstract

A single phase of glassy Cu33Zr67 powders has been synthesized by post-annealing the mechanically alloyed Cu33Zr67 composite powders at 685 K for 1.8 ks. The heat of glassy phase formation was measured directly and found to be -2.59 kJ/mol. The glassy powders transform to big-cube CuZr2 metastable phase (E9 structure) upon heating to 760 K. This metastable phase does not withstand against the temperature increasing during the DSC analysis and therefore transforms completely into the most stable phase of tetragonal CuZr2 (C16 structure) at 918 K.