Thermally Enhanced Glass Formation in Multilayered Cu<SUB>33</SUB>Zr<SUB>67</SUB> Composite Particles

Abstract

A single phase of glassy Cu 33 Zr 67 powders has been synthesized by post-annealing the mechanically alloyed Cu 33 Zr 67 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 CuZr 2 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 CuZr 2 (C16 structure) at 918 K.