Formation and mechanical properties of porous Pd-Pt-Cu-P bulk glassy alloys

Takeshi Wada, Kana Takenaka, Nobuyuki Nishiyama, Akihisa Inoue

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Porous Pd 35Pt 15Cu 30P 20 bulk glassy alloy rods were prepared by holding the alloy melts under 1 MPa hydrogen atmosphere, followed by water quenching in reduced hydrogen pressures of 0.9 or 0.1 MPa. The volume fraction and size of pores were controlled by hydrogen pressure of the atmosphere. No crystalline phase was observed over the whole pore wall regions. The porous alloys show slightly decreased thermal stability as compared with the pore-free one, but still keep a large supercooled liquid region. The porous alloy rods exhibited significant plastic elongations in compression while the pore-free rod fractured instantly after the elastic strain limit. The high plasticity of the porous alloys is presumed to originate from the generation of a high density of shear-bands resulting from the effect of stress concentration around the pores.

Original languageEnglish
Pages (from-to)2777-2780
Number of pages4
JournalMaterials Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2005 Dec 1

Keywords

  • Mechanical property
  • Palladium-based alloy
  • Porous bulk glassy alloy

ASJC Scopus subject areas

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

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