Formation of porous pd-based bulk glassy alloys by a high hydrogen pressure melting-water quenching method and their mechanical properties

Takeshi Wada, Akihisa Inoue

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Porous glassy Pd42.5Cu30Ni7.5P 20 alloy rods of 7 mm in diameter and 50 mm in length were produced by melting the Pd-Cu-Ni-P alloy for 600 s at 853 K in a hydrogen pressure of 1.5 MPa and then water quenching. The pores have a nearly spherical shape and their average size is approximately 200 μm. The volume fraction of the pores was changed in the range of 0.36 to 0.64. The glass transition temperature and crystallization temperature of the porous alloy are 577 and 671 K, respectively, in agreement with those of the pore-free alloy. The porous alloy rod exhibits unique mechanical properties with the features of much higher ductility and flexibility which are significantly different from those for the pore-free alloy rod. The unique mechanical characteristics indicate the possibility of future uses as a new type of structural and functional materials.

Original languageEnglish
Pages (from-to)2761-2765
Number of pages5
JournalMaterials Transactions
Volume45
Issue number8
DOIs
Publication statusPublished - 2004 Aug

Keywords

  • High hydrogen pressure melting
  • Mechanical property
  • Palladium-based alloy
  • Porous bulk glassy alloy
  • Spherical pore
  • Water quenching

ASJC Scopus subject areas

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

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