A mullite oxidation protective coating on SiC coated carbon/carbon composites by hot dipping

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• 作者：Bo Zhang ; Jianfeng Huang ; ^{huangjfsust@126.com" class="auth_mail" title="E-mail the corresponding author} ; Haibo Ouyang ; Liyun Cao ; ^{2644245930@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Cuiyan Li
• 关键词：Mullite coating ; Ceramics ; Hot dipping ; Oxidation ; Carbon/carbon composites
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 November 2016
• 年：2016
• 卷：42
• 期：15
• 页码：17932-17935
• 全文大小：1340 K

文摘

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.