Role of minor addition of metallic alloying elements in formation and properties of Cu-Ti-rich bulk metallic glasses

E. S. Park, H. J. Chang, J. S. Kyeong, D. H. Kim

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The effect of minor addition (MA) of metallic alloying elements in Cu-Ti-rich Cu-Ti-Zr-Ni-Si bulk metallic glasses (BMGs) has been investigated. MA of elements having a relatively small positive enthalpy of mixing (partial substitution of Zr with Nb) leads to enhancement of compressive plasticity (up to about 5% of fracture strain) when the addition leads to improvement in glass-forming ability (GFA). If the GFA is reduced (partial substitution of Ni with Ag or Co), the plasticity is also reduced. On the one hand, the MA of elements having a relatively large positive enthalpy of mixing (partial substitution of Zr with Y) can lead to the liquid-state phase separation in Cu-Ti-Zr-Ni-Si(-Sn) BMGs, although the addition can lead to drastic deterioration in GFA and plasticity. This concept would be considered to be effective even in design of other BMG systems with tailored properties.

Original languageEnglish
Pages (from-to)1995-2002
Number of pages8
JournalJournal of Materials Research
Volume23
Issue number7
DOIs
Publication statusPublished - 2008 Jul 1

All Science Journal Classification (ASJC) codes

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

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