1. High temperature oxidation and high temperature particle erosion resistance of bias-graded TiAlN coating.
- Author
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CAO Xin, XIONG Neng, LI Congjian, WANG Jingjing, ZHANG Xin, and SUN Xiaochuan
- Abstract
The bias-graded TiAIN coating was successfully deposited on Ti6AMV alloy substrates using filtered cathodic vacuum arc (FCVA) technology with the bias-graded deposition method. The high-temperature oxidation performance and high-temperature particle erosion resistance of the coating were evaluated. The changes of surface morphology, composition, phase structure, and erosion damage characteristics of the coating before and after the evaluation were tested and characterized. The results showed that after high-temperature oxidation at 400 °C, the surface color of the bias-graded TiAIN coating deepened and remained intact and smooth without significant damage. The oxygen atom fraction on the surface of the bias coating is 20.9% and the mass increase is 0.81 /.ig/mm2. The structure of the bias-graded coating is more dense, inhibiting the inward expansion of oxygen elements, and has better antioxidant performance than bias-50 TiAIN coating. Under high temperature particle erosion conditions at 400 °C, the erosion rates of bias-graded TiAIN coatings at 30° and 90° erosion angles are 0.26 mg/g and 0.24 mg/g, respectively, which are lower than those of bias-50 TiAIN coatings, exhibiting better resistance to high-temperature particle erosion. At 400 °C, there is no significant oxidation damage to the titanium alloy substrate and TiAIN coating, and high-temperature particle erosion damage is the dominant mechanism of erosion. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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