Thermally Enhanced Glass Formation in Multilayered Cu33Zr67 Composite Particles

M. Sherif El-Eskandarany; Akihisa Inoue

doi:10.2320/matertrans.43.608

Thermally Enhanced Glass Formation in Multilayered Cu₃₃Zr₆₇ Composite Particles

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Keywords: ball milling, mechanical alloying, multilayered powders, solid-state reaction; metallic glassy materials, metastable phase, isothermal annealing, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), diffrential scanning calorimetry (DSC), microstructure, lattice defects

JOURNAL FREE ACCESS

2002 Volume 43 Issue 3 Pages 608-610

DOI https://doi.org/10.2320/matertrans.43.608

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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.

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