Journal
ADVANCES IN APPLIED CERAMICS
Volume 116, Issue 8, Pages 462-467Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17436753.2017.1356044
Keywords
Coating; ZrB2-SiC; oxidation; thermal shock resistance
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In order to improve the oxidation resistance of C/C composites, a ZrB2-SiC/SiC oxidation protective dual-layer coating was prepared by a pack cementation combined with the slurry paste method. The phase and microstructure of the coating were characterised by X-ray diffraction, scanning electron microscope and energy-dispersive spectrometer analyses. The anti-oxidation and thermal shock resistance of the coating were also investigated. It was found that the ZrB2-SiC/SiC coating could effectively improve the oxidation resistance of the C/C composites. The weight loss of the coated samples was only 1.8% after oxidation at 1773K for 18h in air. The coating endured 20 thermal shock cycles between 1773K and room temperature with only 4.6% weight loss.
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