About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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High Entropy Alloys VIII
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Presentation Title |
J-107: Mechanical Properties and Thermal Stability of Single-Target Deposited Ta-Ti-Zr-Based Quinary High-entropy Alloy and Nitride Coatings |
Author(s) |
Chin-Chun Chang, Chia-Ying Yeh, Hsiang-Ming Lai, Yu-Ting Hsiao, Shou-Yi Chang |
On-Site Speaker (Planned) |
Chin-Chun Chang |
Abstract Scope |
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. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |