Self-healing ZrB2-SiO2 oxidation resistance coating for SiC coated carbon/carbon composites
Self-healing ZrB2-SiO2 oxidation resistance coating for SiC coated carbon/carbon composites
复制标题
用于SiC涂层碳/碳复合材料的自修复ZrB2-SiO2抗氧化涂层
DOI：
10.1016/j.corsci.2016.04.040
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发表时间：
2016-09-01
影响因子：
8.3
通讯作者：
Xu Zhanwei
中科院分区：
文献类型：
--
作者：
Ouyang Haibo;Li Cuiyan;Xu Zhanwei
采用SiO_2溶胶渗透法在SiC涂层C/C复合材料表面制备了ZrB_2-SiO_2涂层。ZrB 2-SiO2涂层保护复合材料在1500 ℃下330 h不被氧化，重量损失为158 g/m2。ZrB 2生成ZrO 2和ZrSiO 4，使涂层中固相体积增大，在高温氧化过程中产生压应力。ZrO 2的相变提供了涂层在冷却过程中的压应力。这些压应力抑制了裂纹的形成，提高了涂层的抗氧化性能。(C)2016爱思唯尔有限公司版权所有。
A ZrB2-SiO2 coating was prepared on the SiC coated carbon/carbon composites by infiltrating silica sol into a porous ZrB2 layer. The ZrB2-SiO2 coating protected the composites from oxidation for 330 h at 1500 degrees C with a weight loss of 158 g/m(2). The formation of ZrO2 and ZrSiO4 from ZrB2 expanded the volume of solid phase, generating compressive stress in the coating at high-temperature oxidations. The phase transformation of ZrO2 provided the compressive stress in the coating during cooling. These compressive stresses restrained the formation of cracks and improved the oxidation protection of the coating. (C) 2016 Elsevier Ltd. All rights reserved.