Displacement behavior study of the shear stress effect on the early viscous flow nature of Fe-B-Nb-Y metallic glassy powder in spark plasma sintering

Sangmin Lee, Hidemi Kato, Akihiro Makino, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

(Fe0.72B0.24Nb0.04)95.5Y 4.5 metallic glassy powders were fabricated with a gas-atomizing method and then densely consolidated by the spark plasma sintering (SPS) technique. Densification behavior during the SPS procedure enables us to understand the thermal behavior and viscous deformation profiles of glassy particles. The glassy powders were consolidated under various temperatures to determine the effect of applied stress on the viscous densification behavior. Consequently, viscous densification commenced under a preset stress of 600 MPa at a flow temperature of Tf = 663 K, which is approximately 248 K lower than that under a stress of 32kPa, as shown by thermo-mechanical analysis (TMA). Furthermore, even below Tg, SEM images demonstrated fine imprintability on the glassy powders during this stress-enhanced viscous denstfication.

Original languageEnglish
Pages (from-to)490-493
Number of pages4
JournalMaterials Transactions
Volume50
Issue number3
DOIs
Publication statusPublished - 2009 Mar

Keywords

  • Displacement
  • Metallic glass
  • Spark plasma sintering
  • Stress
  • Viscous flow

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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