1. High temperature oxidation behavior of TiAl alloy with electrodeposited SiOC coating.
- Author
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Yan, Hao-Jie, Li, Yun-Yang, Yin, Ruo-Zhan, Sun, Qing-Qing, Liu, Hui-Jun, Zeng, Chao-Liu, Wu, Lian-Kui, and Cao, Fa-He
- Subjects
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HIGH temperatures , *ALUMINUM oxide , *SURFACE coatings , *ALLOY plating , *PARTIAL pressure - Abstract
SiOC coating was electrodeposited on TiAl alloy to improve the high temperature oxidation resistance. The mass gain of the compact SiOC coating is 0.06 ± 0.026 mg cm-2, which is one order of magnitude lower than that of TiAl alloy. The SiOC coating exhibits good thermal stability and partial amorphous SiOC transforms into crystal SiO 2 or SiC. After oxidation, no obvious pore can be found in the coating. Moreover, an Al 2 O 3 layer is generated due to the enrichment of Al and the low oxygen partial pressure at the coating/substrate interface, therefore improving the barrier property of the oxide scale. [Display omitted] • SiOC coating is prepared on TiAl alloy by electrodeposition. • The high temperature oxidation resistance of the TiAl alloy with the SiOC coating is dramatically improved. • Thermal exposure results in partial amorphous SiOC transforms into crystal SiO 2 or SiC. • The outward diffused Al can strengthen the network structure of the SiOC coating and establish an Al 2 O 3 intermediate layer. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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