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Sui, Xinmeng; Lu, Jian; Wei, Deqiang; Zhang, Lin; Wang, Rong; Zhao, Wei; Zhang, Weiping
Corrosion science, September 2022, 2022-09-00, Letnik: 206Journal Article
The effect of TiN addition on the high temperature oxidation behavior of Ti-Al-Cr coating was investigated. Results revealed that the coating with 4 wt.% TiN addition exhibited superior oxidation resistance. The minimum mass gain after being oxidized at 850 ℃ was 0.56 mg/cm2, which was 40.1% less than that of the TiN-free coating. The mechanisms for TiN addition can enhance the high-temperature oxidation resistance of Ti-Al-Cr coating include the dispersed TiN resulting in more grain boundaries and prolonging the diffusion paths of oxygen and contributing to the generation of a protective CrAlN layer to diminish the inward oxygen diffusion, as well as facilitating the formation of the dense internal oxide layer Al2O3 and Cr2O3. Display omitted •Ti-Al-Cr coatings with TiN addition were fabricated on TC21 for the first time.•TiN addition can promote the formation of core-ring microstructure.•The addition of TiN in the Ti-Al-Cr coating decreased oxidation rate.•TiN addition can change the oxide scale of Ti-Al-Cr coating.•The presence of CrAlN phase inhibited the internal diffusion of O in the oxide scales.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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