Formation, Thermal Stability and Mechanical Properties in Zr-Al-Co Bulk Glassy Alloys

• Wada Takeshi

  Graduate School, Tohoku University

• Zhang Tao

  Institute for Materials Research, Tohoku University

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

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.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (11), 2843-2846, 2002

  The Japan Institute of Metals and Materials

Keywords

• bulk glassy alloy
• zirconium-aluminum-cobalt system
• casting
• supercooled liquid
• high mechanical strength

Details

• CRID: 1390001204246315648
• NII Article ID: 130004451733
• NII Article ID: 10012328221
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.43.2843
• COI: 1:CAS:528:DC%2BD3sXjtFGl
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 6367485
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6367485
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/11/43_11_2843/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed