Mg-Y-Cu bulk nanocrystalline matrix composites containing WC particles

P. Y. Lee, C. Lo, J. S.C. Jang, J. C. Huang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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/ Mg49Y 15Cu36 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/Mg49Y15Cu36BMG composites.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalKey Engineering Materials
Volume313
DOIs
StatePublished - 2006

Keywords

  • Bulk metallic glass
  • Mechanical alloying
  • Supercooled liquid region
  • Vacuum hot pressing

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