Supercooled liquid foaming of a Zr-Al-Cu-Ag bulk metallic glass containing pressurized helium pores

Takeshi Wada, Xinmin Wang, Hisamichi Kimura, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Foaming of a Zr-based metallic glass in the supercooled liquid is successfully performed by introducing pressurized pores and subsequent isochronal annealing. Melting of a Zr48Cu36Al8Ag8 powder under 12 MPa pressurized helium atmosphere followed by water quenching introduces spherical helium pores, whose average diameter and volume fraction are estimated respectively to be 30 μm and 7%, into a fully glassy bulk Zr48Cu36Al8Ag8 alloy. The isochronal annealing of the porous alloy below the crystallization temperature under atmospheric pressure of argon enables the expansion of pores by viscous flow deformation of the supercooled liquid, resulting in a high porosity structure up to 70% with a uniform cell size and cell distribution.

Original languageEnglish
Pages (from-to)858-860
Number of pages3
JournalMaterials Letters
Volume63
Issue number11
DOIs
Publication statusPublished - 2009 Apr 30

Keywords

  • Foaming
  • Metallic glass
  • Metals and alloys
  • Porosity
  • Supercooled liquid

ASJC Scopus subject areas

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

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