(ZrB2-SiC)/SiC oxidation protective coatings for graphite materials

摘要

ZrB2-SiC coatings were prepared on the SiC coated specimens by pack cementation method at 1900 degrees C for 2 h. The phase, microstructure, anti-oxidation and thermal shock resistance properties of these coatings were investigated. It was found that ZrB2-SiC coatings improved antioxidation and thermal shock resistance. ZS50 coating endured 15 thermal shock cycles between 1500 degrees C and room temperature with 20.2% weight loss, which was attributed to the dense glass phase formed after oxidation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.