Mechanical properties of ZrCuTi thin film metallic glass with high content of immiscible tantalum

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)587-590
Journal / PublicationSurface and Coatings Technology
Volume205
Issue number2
Online published18 Jul 2010
Publication statusPublished - 15 Oct 2010
Externally publishedYes

Abstract

The ZrCuTi thin film metallic glasses (TFMGs) with immiscible Ta were successfully fabricated via co-sputtering. The glass forming composition for ZrCuTi-Ta TFMGs ranges from 0 to ~. 75 at.% of immiscible Ta, distinctly different from bulk metallic glasses (BMGs). When Ta content is over 75 at.%, the amorphous TFMG structure gradually transforms to nanocrystalline β-Ta. The mechanical properties are strongly influenced by Ta content. The elastic modulus remains nearly constant over 0-50 at.% Ta, and increase rapidly over 50-100% Ta. The key factor appears to be the population of the Ta-Ta strong bonds. The highest elastic modulus and hardness up to ~. 140. GPa and 10. GPa, respectively, of the Ta-rich TFMGs, much higher than the Zr-, Cu- and Ti-based amorphous alloys, might be useful for applications.

Research Area(s)

  • Immiscible, Nanoindentation, Thin films metallic glasses