Formation, thermal stability and mechanical properties in Zr-Al-Co bulk glassy alloys

Takeshi Wada, Tao Zhang, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

A Zr-Al-Co ternary alloy was investigated in order to clarify the glass-forming ability, thermal stability and mechanical properties. The Zr55Al20Co25 alloy was found to be fabricated in bulk glassy alloy rods with diameters up to at least 2.5 mm. The glassy alloy rod of 2.5 mm in diameter exhibits a large supercooled liquid region of 79 K, followed by a nearly single exothermic peak due to the precipitation of ZrCo + ZrAlCo + Zr6Al2Co phases. The glassy alloy rod exhibits Young's modulus of 114 GPa, high compressive fracture strength of 1900 MPa and total fracture elongation of 1.7%. The finding of forming the bulk glassy alloy at the new ternary composition of Zr55Al20Co25 by the copper mold casting method is encouraging for future search of a new glassy alloy composition.

Original languageEnglish
Pages (from-to)2843-2846
Number of pages4
JournalMaterials Transactions
Volume43
Issue number11
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Bulk glassy alloy
  • Casting
  • High mechanical strength
  • Supercooled liquid
  • Zirconium-aluminum-cobalt system

ASJC Scopus subject areas

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

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