Fragility and thermal stability of Pt- and Pd-based bulk glass forming liquids and their correlation with deformability

H. Kato, T. Wada, M. Hasegawa, J. Saida, A. Inoue, H. S. Chen

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)

Abstract

The fragility parameter m of (Pt or Pd)-(Ni, Cu)-P bulk metallic glasses (BMGs) was characterized and compared to other systems. The results indicate that the Pt65Ni15P25 alloy is the most fragile and thermally stable at the supercooled liquid state, thus is the most workable among the presently developed BMGs. To express the degree of workability, a deformability d* = log [ η ( Tg* ) / η ( Tx ) ] is introduced then correlated with m and the reduced thermal stability Δ Trx* = ( Tx - Tg* ) / Tg*. A master curve in term of η ( Tg* ) / η ( T ) and m · [ ( T - Tg* ) / Tg* ] has been established for various BMGs, d* thus can be uniquely related to m · Δ Trx*.

Original languageEnglish
Pages (from-to)2023-2027
Number of pages5
JournalScripta Materialia
Volume54
Issue number12
DOIs
Publication statusPublished - 2006 Jun 1

Keywords

  • Fragility
  • High temperature deformation
  • Metallic glass
  • Superplasticity

ASJC Scopus subject areas

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

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