Viscous flow during spark plasma sintering of Ti-based metallic glassy powders

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Abstract

Viscous flow has rarely been observed in solid-state sintering of metal, while operates the dominant mass transport mechanisms in vitreous materials. In the present study, Ti-based bulk metallic glasses (BMGs) with nearly 100% relative density were fabricated by spark plasma sintering of a gas-atomized Ti48Ni32Cu8Si8Sn4 glassy alloy powder. Two main shrinkage stages of densification occurred at a constant heating rate. Based on the analysis of experimental data and microstructure observations of samples sintered at various temperatures, sintering mechanisms are proposed for the sintering of Ti-based metallic glassy powders in light of the viscous flow model.
Original languageEnglish
Pages (from-to)98-101
Number of pages4
JournalJournal of Alloys and Compounds
Volume557
DOIs
Publication statusPublished - 25 Apr 2013

Keywords

  • Bulk metallic glasses
  • Powder metallurgy
  • Spark plasma sintering
  • Viscous flow

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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