A mullite oxidation protective coating on SiC coated carbon/carbon composites by hot dipping. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Zhang, Bo; Huang, Jianfeng; Ouyang, Haibo; Cao, Liyun; Li, Cuiyan
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 17932
• Page End: 17935
• Publication Date: 2016-11-15
• Subjects: Mullite coating -- Ceramics -- Hot dipping -- Oxidation -- Carbon/carbon composites; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.08.044
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A dense, uniform, crack free and well-bonded oxidation-protective mullite coating was successfully fabricated on SiC-coated carbon/carbon (C/C) composites by a novel hot dipping process. XRD and EDS line scanning analyses shows that the phase of the coating is composed of mullite and the bonding coating between the coating and C/C composites is composed of SiC and Si. Besides, SEM images of the surface and cross-section of the coating also display the dense microstructure. The mullite/SiC coating was found to protect C/C composites from oxidation at 1773 K for 168 h with a weight loss rate of only 3.9×10 −5 g cm −2 h −1 .