Mg-Y-Cu Bulk Nanocrystalline Matrix Composites Containing WC Particles |
| Journal |
Key Engineering Materials (Volume 313) |
| Volume |
Composite Materials IV |
| Edited by |
Chi Y.A. Tsao and Jing Kun Guo |
| Pages |
25-30 |
| DOI |
10.4028/www.scientific.net/KEM.313.25 |
| Online since |
July, 2006 |
| Authors |
Pee Yew Lee,
C. Lo,
Jason S.C. Jang,
J.C. Huang
|
| Keywords |
Bulk Metallic Glass, Mechanical Alloying (MA), Supercooled Liquid Region, Vacuum Hot Pressing |
| 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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