Development of Ni- and Cu-Free Zr-based bulk metallic glasses for biomedical applications

Z. Liu, Kang Cheung Chan, L. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Two Ni- and Cu-free bulk metallic glasses (BMGs) of Zr65Pd17.5Fe10Al7.5and Zr65Pd12.5Ag5Fe10Al7.5, with a critical casting diameter of 6mm and a compressive strength above 1500 MPa, were developed. While the Zr65Pd17.5Fe10Al7.5alloy showed little plastic strain before fracture, the Zr65Pd12.5Ag5Fe10Al7.5alloy exhibited much larger plasticity by the relatively stable, intermittent propagation of the major shear band under compression. This unusual plastic deformation behavior was interpreted on the basis of the contribution of the icosahedral shortrange order. Potentiodynamic polarization tests revealed that the Zr65Pd12.5Ag5Fe10Al7.5alloy has a higher corrosion resistance than the Zr65Pd17.5Fe10Al7.5alloy in phosphate buffered saline at 37°C. X-ray photoelectron spectroscopy analysis revealed that the passive film of Zr65Pd12.5Ag5Fe10Al7.5alloy consisted mostly of ZrO2, which may be responsible for the excellent corrosion resistance of this alloy. Ni- and Cufree BMGs with a critical diameter of 6 mm, together with enhanced mechanical properties and corrosion resistance, may be promising in biomedical applications.
Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalMaterials Transactions
Volume52
Issue number1
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • Biomaterials
  • Bulk metallic glass
  • Corrosion resistance
  • Glass forming ability
  • Plasticity
  • Short-range order

ASJC Scopus subject areas

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

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