Effect of Temperature on Oxidation Behavior of 3-Dimensional C/SiC Composites Coated by Different Structural SiC and a-BCx Coatings in Static Wet Oxygen Atmosphere

Publisher: Blackwell Publishing

E-ISSN: 1744-7402|12|2|363-370

ISSN: 1546-542X

Source: International Journal of Applied Ceramic Technology, Vol.12, Iss.2, 2015-03, pp. : 363-370

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Abstract

The effect of temperature on oxidation behavior of 3-dimensional C/SiC composites coated with SiC and a-BCx coatings was investigated. Below 1000°C, C/SiC composites with SiC coating (sample SSS) showed low residual strength, while the composites with a-BCx coating (sample BBB) and the composites with a-BCx/a-BCx/SiC coatings (sample BBS) showed high residual strength. Above 1000°C, samples SSS and BBS showed high residual strength, while sample BBB showed the opposite results. Sample BBS presented better oxidation resistance during 700–1200°C. The oxidation temperature made an effect on self-sealing mode of sample BBS.

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