Multi-composition oxidation resistant coating for SiC-coated carbon/carbon composites at high temperature

作者：Geng Sheng Hao; He Jun Li^*; Ke Zhi Li; Yu Lei Zhang

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2008, 486(1-2): 556-561.

DOI：10.1016/j.msea.2007.09.042

• carbon/carbon composites
• coating
• oxidation

This work proposes a multi-composition oxidation resistant coating for SiC-coated carbon/carbon (C/C) composites by slurry method using the mixture of Y(2)O(3), ZrO(2), Al(2)O(3), Si and C. XRD analysis shows that the phases of the composite coating are composed of SiC, Al(2)O(3), Y(2)O(3), ZrO(2), Al(4)SiC(4) and Y(3)Al(2)(AlO(4))(3). SEM analysis of the cross section of the coating displays the microstructure with 500 mu m thickness which filled the porous SiC. Oxidation test shows that, after 19 h oxidation in air at 1873 K, the weight loss of the coated SiC-C/C is only 1.76%. The oxidation of the coated C/C composites was primarily due to the reaction of CIC matrix and oxygen diffusing through the penetrable cracks and bubble holes in the coating.

• 出版日期2008-6-15
• 单位西北工业大学