Formation and thermal stability of Ca-Mg-Ag-Cu bulk glassy alloys

Kenji Amiya, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Calcium-based bulk glassy alloys in Ca-Mg-Ag and Ca-Mg-Ag-Cu systems were produced by a metallic mold casting method. The maximum rod diameter (dmax) for the formation of a glassy phase was 4 mm for Ca60Mg20Ag20 and 7 mm for Ca60Mg20Ag10Cu10. The glass transition temperature (Tg), crystallization temperature (Tx), temperature interval of supercooled liquid region (ΔTx = Tx - Tg) and melting temperature (Tm) were 401 K, 435 K, 35 K and 654 K, respectively, for the former alloy and 398 K, 428 K, 30 K and 624 K, respectively, for the latter alloy. The simultaneous addition of Ag and Cu in the Ca-Mg-(Ag, Cu) system causes a steep decrease in Tm and an increase in the reduced glass transition temperature (Tg/Tm), leading to an increase in the glass-forming ability.

Original languageEnglish
Pages (from-to)2578-2581
Number of pages4
JournalMaterials Transactions
Volume43
Issue number10
DOIs
Publication statusPublished - 2002 Oct
Externally publishedYes

Keywords

  • Bulk glass
  • Calcium-based glassy alloy
  • Reduced glass transition temperature
  • Simple metal base system

ASJC Scopus subject areas

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

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