Fabrication of Mg-Y-Cu bulk metallic glass by mechanical alloying and hot consolidation

P. Y. Lee, W. C. Liu, C. K. Lin, J. C. Huang

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12 Citations (Scopus)

Abstract

Mg45Y15Cu40 (numbers indicate at.%) metallic glass powders were prepared by the mechanical alloying of pure Mg, Y, and Cu after 10 h of milling. The thermal stability of these Mg45Y15Cu40 amorphous powders was investigated using the differential scanning calorimeter (DSC). Tg, Tx, and ΔTx are 456, 491, and 35 K, respectively. The as-milled Mg45Y15Cu40 powders were then consolidated by vacuum hot pressing into disk compacts with a diameter and thickness of 10 and 1 mm, respectively. This yielded bulk Mg45Y15Cu40 metallic glass with nanocrystalline precipitates homogeneously embedded in a highly dense glassy matrix. The pressure applied during consolidation can enhance thermal stability and prolong the existence of amorphous phase within Mg45Y15Cu40 powders.

Original languageEnglish
Pages (from-to)1095-1098
Number of pages4
JournalMaterials Science and Engineering A
Volume448-451
DOIs
Publication statusPublished - Mar 25 2007
Externally publishedYes

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Keywords

  • Bulk metallic glass
  • Mechanical alloying
  • Mg-based alloys
  • Supercooled liquid region
  • Vacuum hot pressing

ASJC Scopus subject areas

  • Materials Science(all)

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