- Title
- Cathodic arc deposition of high entropy alloy thin films with controllable microstructure
- Creator
- Zhao, Hong; Zheng, Zhong; Liu, Zongwen; Zhou, Haoruo; Chang, Li; Tsoutas, Kostadinos; Yang, Limei; Alavi, Seyedeh KH; Liu, Yanping; Akhavan, Behnam; Bilek, Marcela M
- Relation
- Surfaces and Interfaces Vol. 37, no. 102692
- Publisher Link
- http://dx.doi.org/10.1016/j.surfin.2023.102692
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2023
- Description
- High entropy alloys (HEAs) are a novel class of materials exhibiting properties of high strength, high corrosion and oxidation resistance, and superb thermal stability. Cathodic arc deposition is an established physical vapor deposition (PVD) technology offering high deposition rate and high degrees of plasma ionization with controllable ion kinetic energy. Here we employed cathodic arc deposition to fabricate AlCrFeCoNiCu0.5 HEA thin films. To elucidate the growth mechanisms and microstructures of the HEA thin film microstructures, we varied arc and duct currents. The crystallography of the films was investigated using X-ray diffraction (XRD). The film chemistry and microstructure of the film-substrate interphase were comprehensively studied using transmission electron microscopy (TEM). Atomic force microscopy (AFM) was applied to study the surface morphology, and mechanical properties were evaluated using nanoindentation. It is demonstrated that the grain size in HEA thin films can be effectively controlled by the deposition rate, while the HEA film hardness and surface roughness are modulated by the grain size. The results presented here have important implications for the fabrication of HEA thin films using cathodic arc deposition as an industrially scalable technique.
- Subject
- high entropy alloy coatings; cathodic arc; energetic condensation; interphase; crystal nucleation and growth
- Identifier
- http://hdl.handle.net/1959.13/1486245
- Identifier
- uon:51812
- Identifier
- ISSN:2468-0230
- Language
- eng
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