Investigation of the Interaction of Y2O3–Al2O3–SiO2 Coatings with Water Vapor and Na2SO4 at Temperatures to 1450°C

• Published in: Glass and ceramics Vol. 78; no. 7-8; pp. 301 - 307
• Main Authors: Lebedeva, Yu. E., Chainikova, A. S., Shchegoleva, N. E., Solntsev, S. S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2021; Springer Nature B.V
• Subjects: Aluminosilicates; Aluminum oxide; Aluminum silicates; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coatings; Composites; Glass; Materials Science; Natural Materials; Oxidation resistance; Silicon carbide; Silicon dioxide; Silicon substrates; Sol-gel processes; Vapor resistance; Water resistance; Water vapor; Weight reduction; Yttrium; Yttrium oxide; salt vapor; yttrium aluminosilicate system; water vapor; silicon carbide; protective coating
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/s10717-021-00400-1

Coatings based on the system Y 2 O 3 –Al 2 O 3 –SiO 2 are promising for protecting silicon carbide based materials from the effects of an oxidizing atmosphere, water vapor, and salt vapors. The interaction of Y 2 O 3 –Al 2 O 3 –SiO 2 coatings, obtained by the sol-gel method, with water vapor and Na 2 SO 4 salt was investigated. Coatings based on the yttrium aluminosilicate system were found to have good oxidative and chemical resistance to water vapor and Na 2 SO 4 salt at temperatures 1300 – 1450°C. The weight gain for the coated samples tested in Na 2 SO 4 salt vapor did not exceed 1%. The initial SiC substrates are characterized by active oxidation processes with weight reduction from 8 to 11%.