|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Mechanical Properties and Thermal Stability of Single-Target Deposited Ta-Ti-Zr-Based Quinary High-Entropy Alloy and Nitride Coatings
||Chin-Chun Chang, Chia-Ying Yeh, Hsiang-Ming Lai, Yu-Ting Hsiao, Shou-Yi Chang
|On-Site Speaker (Planned)
Multi-component alloy and nitride coatings have been developed to improve the mechanical performance, thermal stability and wear/oxidation resistance of protective hard coatings. High-entropy coatings with a simple solid-solution structure have particularly attracted great interest in recent years. In this study, several coatings of Ta-Ti-Zr-based quinary high-entropy alloys and nitrides with the additions of Al, Cr, Hf, Mo and/or Nb were deposited using a single-target sputtering system in an N2/Ar mixed atmosphere. Most of the high-entropy alloy coatings exhibited a near-amorphous structure, while the nitride coatings had a simple face-centered cubic solid-solution structure. Compared to traditional hard coatings, the high-entropy alloy coatings easily had a hardness up to 10 GPa, and the nitride coatings had a hardness of 30 GP and a better thermal stability/oxidation resistance. The elements Hf, Mo and Nb were found to improve the mechanical properties, and Cr, Ta and Zr to improve the oxidation resistance.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume