Undercooling behavior and critical cooling rate of Pd-Pt-Cu-P alloy

Nobuyuki Nishiyama, Kana Takenaka, Takeshi Wada, Hisamichi Kimura, Akihisa Inoue

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In order to realize biomedical applications of bulk glassy alloys, we have developed new Pd-based glassy alloys with Ni-free composition in Pd-Pt-Cu-P system and it is revealed that the highest glass-forming ability is obtained at a composition of Pd35Pt15Cu30P20. In addition, the alloy can be formed into bulk glassy rods with diameters of up to at least 30 mm by fluxed water quenching. In order to clarify the critical cooling rate for glass-formation, undercooling behavior and crystal growth rate are also discussed. Crystallization of the alloy under continuous cooling is mainly dominated by surface nucleation. Apparent crystal growth rate of the alloy at 0.73 Tm is evaluated to be 5.2 × 10-6 m.s-1 and this value is four orders of magnitude higher than that of previous Pd40Cu30Ni10P20 at the same degree of undercooling.

Original languageEnglish
Pages (from-to)2807-2810
Number of pages4
JournalMaterials Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2005 Dec 1

Keywords

  • Biomedical applications
  • Bulk glassy alloys
  • Critical cooling rate
  • Nickel-allergy
  • Undercooling behavior

ASJC Scopus subject areas

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

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