Journal
MATERIALS LETTERS
Volume 210, Issue -, Pages 84-87Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2017.08.129
Keywords
Nanocrystalline; High entropy alloys; Thin films; Thermal stability; Hardness; Electrical properties
Funding
- National Natural Science Foundation of China [51571157, 51621063, 51625103, 51722104]
- National Key Research and Development Program of China [2017YFB0702301]
- 111 Project of China [B06025]
- International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies
- Fundamental Research Funds for the Central Universities
- Tengfei Scholar project
- China Postdoctoral Science Foundation [2016M590940, 2017T100744]
- Shaanxi Province Postdoctoral Scientific Research Projects
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In this work, we systematically investigated the hardness, electrical resistance and thermal stability of nanocrystalline NbMoTaW high entropy alloy films with thickness varying from about 100 to 2000 nm. The nanocrystalline high entropy alloy film exhibited the peak hardness (similar to 16.0 GPa), strong size-independent electrical resistance (similar to 170 mu Omega.cm) as well as stabilized single phase body-centered cubic (BCC) structure even after exposed to vacuum annealing at 800 degrees C for 2 h. In the meantime, we provide reasonable insights into understanding behaviors above. With superior mechanical and electrical properties as well as good thermal stability, this kind of refractory nanocrystalline HEAFs will find extensive potential applications. (C) 2017 Elsevier B.V. All rights reserved.
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