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

作者：Chou, H S; Huang, J C^*; Chang, L W

来源：Surface and Coatings Technology, 2010, 205(2): 587-590.

DOI：10.1016/j.surfcoat.2010.07.042

• Thin films metallic glasses
• Immiscible
• Nanoindentation

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 similar 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 beta-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-, Cuand Ti-based amorphous alloys, might be useful for applications.

• 出版日期2010-10-15
• 单位中山大学