4.7 Article

Preparation and characterization of monolayer oxidation resistant coating on C/SiC composites

期刊

CERAMICS INTERNATIONAL
卷 48, 期 16, 页码 23731-23739

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.05.024

关键词

C; SiC composite; Monolayer coating; Bond stability; Oxidization resistance; Atmospheric plasma spraying

资金

  1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory Foundation [WDZC20195500501]
  2. project of Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation [2015CL02]
  3. Changsha University of Science Technology

向作者/读者索取更多资源

This study deposited monolayer coatings of BSAS, Yb2SiO5, and Y2SiO5 on C/SiC composites using atmospheric plasma spraying (APS) and investigated their thermal, chemical, microstructural properties, bond stability, and oxidation protection. The results showed that the monolayer coatings effectively improved the oxidation resistance of the composites. Among the tested coatings, the Y2SiO5 coating exhibited excellent mechanical properties and a compact structure, resulting in the highest bond stability and best protection.
Ba0.25Sr0.75Al2Si2O8 (BSAS), Yb2SiO5 and Y2SiO5 are widely deposited as the main phase of composite coatings or as the functional layer in multilayer coatings. The investigation of monolayer coating can not only broaden the application of monolayer anti-oxidation coating, but also be an important basis for the design of multilayer and composite coatings. Monolayer BSAS, Yb2SiO5 and Y2SiO5 coatings were deposited on C/SiC composite by atmospheric plasma spraying (APS). Thermal physics and chemical properties, microstructure, bond stability and oxidation protection of the monolayer coatings were investigated. The results showed that the monolayer coating effectively improved the oxidation resistance of C/SiC composite. The microstructure and mechanical properties of the coatings play an important role in the bond stability and oxidation resistance of the coated sample. Among the tested coatings, the Y2SiO5 coating exhibited excellent mechanical properties and compact structure, which resulted in the highest bond stability and the best protection.

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