Pengju Chen , Peng Xiao , Zhuan Li , Yichen Wang , Xian Tang , Yang Li
{"title":"空气喷涂双层Yb2Si2O7/SiC和三层Yb2Si2O7/ (sicw -莫来石)/SiC环境屏障涂层的水蒸气腐蚀行为及失效机理","authors":"Pengju Chen , Peng Xiao , Zhuan Li , Yichen Wang , Xian Tang , Yang Li","doi":"10.1016/j.apmate.2022.100064","DOIUrl":null,"url":null,"abstract":"<div><p>To improve the corrosion resistance of C<sub>f</sub>/SiC composites in a water vapor oxygen coupled environment, the bi-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SiC and tri-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/(SiC<sub>w</sub>-Mullite, SM)/SiC environment barrier coatings were designed and prepared on the surface of C<sub>f</sub>/SiC composites by chemical vapor deposition and sol-gel method united with air spraying. Results show that the mass loss of bi-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SiC coating coated samples was 17.24 × 10<sup>−3</sup> g cm<sup>−2</sup> after 200 h oxidation at 1673 K, and the average compression strength retention rate was only 79.44% due to the formation of wide penetrating cracks. Comparatively, SiC whiskers in SM middle coating can not only increase the crack propagation resistance of mullite middle coating, but also alleviate the difference of coefficient of thermal expansion between Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> outer coating and mullite middle coating. Therefore, the mass loss of tri-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SM/SiC coating coated samples was only 2.93 × 10<sup>−3</sup> g cm<sup>−2</sup> after 200 h oxidation at 1673 K, and the average compression strength retention rate was up to 98.79%.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Water vapor corrosion behavior and failure mechanism of air sprayed bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/ (SiCw-Mullite)/SiC environmental barrier coating\",\"authors\":\"Pengju Chen , Peng Xiao , Zhuan Li , Yichen Wang , Xian Tang , Yang Li\",\"doi\":\"10.1016/j.apmate.2022.100064\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To improve the corrosion resistance of C<sub>f</sub>/SiC composites in a water vapor oxygen coupled environment, the bi-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SiC and tri-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/(SiC<sub>w</sub>-Mullite, SM)/SiC environment barrier coatings were designed and prepared on the surface of C<sub>f</sub>/SiC composites by chemical vapor deposition and sol-gel method united with air spraying. Results show that the mass loss of bi-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SiC coating coated samples was 17.24 × 10<sup>−3</sup> g cm<sup>−2</sup> after 200 h oxidation at 1673 K, and the average compression strength retention rate was only 79.44% due to the formation of wide penetrating cracks. Comparatively, SiC whiskers in SM middle coating can not only increase the crack propagation resistance of mullite middle coating, but also alleviate the difference of coefficient of thermal expansion between Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> outer coating and mullite middle coating. Therefore, the mass loss of tri-layer Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/SM/SiC coating coated samples was only 2.93 × 10<sup>−3</sup> g cm<sup>−2</sup> after 200 h oxidation at 1673 K, and the average compression strength retention rate was up to 98.79%.</p></div>\",\"PeriodicalId\":7283,\"journal\":{\"name\":\"Advanced Powder Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Powder Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2772834X22000471\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Powder Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772834X22000471","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Water vapor corrosion behavior and failure mechanism of air sprayed bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/ (SiCw-Mullite)/SiC environmental barrier coating
To improve the corrosion resistance of Cf/SiC composites in a water vapor oxygen coupled environment, the bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/(SiCw-Mullite, SM)/SiC environment barrier coatings were designed and prepared on the surface of Cf/SiC composites by chemical vapor deposition and sol-gel method united with air spraying. Results show that the mass loss of bi-layer Yb2Si2O7/SiC coating coated samples was 17.24 × 10−3 g cm−2 after 200 h oxidation at 1673 K, and the average compression strength retention rate was only 79.44% due to the formation of wide penetrating cracks. Comparatively, SiC whiskers in SM middle coating can not only increase the crack propagation resistance of mullite middle coating, but also alleviate the difference of coefficient of thermal expansion between Yb2Si2O7 outer coating and mullite middle coating. Therefore, the mass loss of tri-layer Yb2Si2O7/SM/SiC coating coated samples was only 2.93 × 10−3 g cm−2 after 200 h oxidation at 1673 K, and the average compression strength retention rate was up to 98.79%.
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