Cu-Zr-Ti Bulk Metallic Glass Composites Produced by Mechanical Alloying and Vacuum Hot-Pressing

Abstract:

In the present study, WC/Cu60Zr30Ti10 metallic glass composite powders were prepared by mechanical alloying of pure Cu, Zr, Ti, and WC powder mixtures. Cu60Zr30Ti10 metallic glass composite powders were obtained after 5 h of milling as confirmed by X-ray diffraction and differential scanning calorimetry. The metallic glass composites powders were found to exhibit a supercooled liquid region before crystallization. Bulk metallic glass (BMG) composites were synthesized by vacuum hot pressing the as-milled Cu60Zr30Ti10 metallic glass composite powders at 723 K in the pressure range of 0.72-1.20 GPa. BMG composite with submicron WC particles homogeneously embedded in a highly dense anocrystalline/amorphous matrix was successfully prepared under applied pressure of 1.20 GPa. It was found that the pressure could enhance the thermal stability and promotes nocrystallization of WC/Cu60Zr30Ti10 BMG composites.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 3443-3450
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.3443
• Online since: January 2005
• Authors: C.C. Wang, Chung Kwei Lin, Y.L. Lin, J.S. Chen, R.R. Jen, Pee Yew Lee
• Keywords: Bulk Metallic Glass Composites, Mechanical Alloying (MA), Pressure-Induced Nanocrystallization, Supercooled Liquid Region, Vacuum Hot Pressing

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