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Ti-Cu-Zr-Fe-Sn-Si-Sc bulk metallic glasses with good mechanical properties for biomedical applications

  • Beihang University

Research output: Contribution to journalArticlepeer-review

Abstract

Ti-based bulk metallic glasses (BMGs) free from highly toxic elements Ni and Be and noble elements were designed and synthesized in Ti47-xCu40Zr7.5Fe2.5Sn2Si1Scx (x = 1, 2, 3 and 4 at.%) system as potential biomaterials, and the effects of Sc alloying on glass-formation and properties of the Ti-based BMGs were investigated. The Ti-based BMGs containing 2 and 3 at.% Sc exhibited high glass-forming ability (GFA) and wide supercooled liquid region, and glassy rods with a diameter of 6 mm could be prepared by tilt-pour copper-mold casting. The Ti-based BMGs possess low Young's modulus of 93-99 GPa, high yield strength of 1948-2021 MPa and specific strength of about 3.2 × 105 N m/kg and plastic strain up to 5.9% under compression, and high Vickers microhardness of 577-590 Hv. The Ti-Cu-Zr-Fe-Sn-Si-Sc glassy alloys also exhibited good bio-corrosion resistance and biocompatibility. The mechanisms for the effects of Sc addition on glass formation, mechanical properties, corrosion behaviors and biocompatibility of the Ti-based BMGs are discussed. The combination of superior GFA, good mechano- and bio-compatibility demonstrates the potential of the Ti-Cu-Zr-Fe-Sn-Si-Sc BMGs for biomedical applications.

Original languageEnglish
Pages (from-to)341-349
Number of pages9
JournalJournal of Alloys and Compounds
Volume679
DOIs
StatePublished - 15 Sep 2016

Keywords

  • Bio-corrosion resistance
  • Biocompatibility
  • Biomaterials
  • Bulk metallic glasses
  • Mechanical properties
  • Ti alloys

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