Mg-Y-Cu Bulk Nanocrystalline Matrix Composites Containing WC Particles

Pee Yew Lee; C. Lo; Jason S.C. Jang; J.C. Huang

doi:10.4028/www.scientific.net/KEM.313.25

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 313Mg-Y-Cu Bulk Nanocrystalline Matrix Composites...

Mg-Y-Cu Bulk Nanocrystalline Matrix Composites Containing WC Particles

Abstract:

The preparation of Mg49Y15Cu36 metallic glass composite powders was accomplished by mechanical alloying of pure Mg, Y, Cu, and WC powder mixture after 10 h milling. In the ball-milled composites, initial WC particles were homogeneously dispersed in the Mg-based alloy glassy matrix. The metallic glass composites powders were found to exhibit a large supercooled liquid region before crystallization. Bulk metallic glass composites were formed by vacuum hot pressing the as-milled WC/ Mg49Y15Cu36 metallic glass composite powders at 473 K in the pressure range of 0.72-1.20 GPa. BMG composite with submicron WC particles homogeneously embedded in a highly dense nanocrystalline/amorphous matrix was successfully prepared under pressure of 1.20 GPa. It was found that the applied pressure during consolidation could enhance the thermal stability and promotes nanocrystallization of WC/ Mg49Y15Cu36 BMG composites.

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Periodical:

Key Engineering Materials (Volume 313)

Pages:

25-30

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.313.25

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Online since:

July 2006

Authors:

Pee Yew Lee, C. Lo, Jason S.C. Jang, J.C. Huang

Keywords:

Bulk Metallic Glass (BMG), Mechanical Alloying (MA), Supercooled Liquid Region, Vacuum Hot Pressing

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