Surface modification of carbon/carbon composites and in-situ grown SiC nanowires to enhance the thermal cycling performance of Si-Mo-Cr coating under parallel oxyacetylene torch
Surface modification of carbon/carbon composites and in-situ grown SiC nanowires to enhance the thermal cycling performance of Si-Mo-Cr coating under parallel oxyacetylene torch
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DOI：
10.1016/j.corsci.2016.06.007
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发表时间：
2016-10
影响因子：
8.3
通讯作者：
Jiaping Zhang;Q. Fu;Junling Qu;Huashan Zhou;Ningkun Liu
中科院分区：
文献类型：
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作者：
Jiaping Zhang;Q. Fu;Junling Qu;Huashan Zhou;Ningkun Liu
在制备Si-Mo-Cr涂层之前，对C/C复合材料和原位生长的SiC纳米线进行了爆破处理。在1600℃至室温之间进行30次热循环后，与未添加SiC纳米线的C/C复合材料相比，Si-Mo-Cr涂层的结合强度提高了5.7%，单位面积质量损失降低了46.39%。性能的增强可归因于C/C衬底与Si-Mo-Cr涂层之间的结合强度提高和热膨胀系数不匹配的缓解，从而降低了高温和低温之间热循环时的热应力。
Before the preparation of Si-Mo-Cr coating, blasting treatment of C/C composites and in-situ grown SiC nanowires were performed. Compared with the coated C/C composites without SiC nanowires, the bonding strength of Si-Mo-Cr coating was increased by 5.7%, and the mass loss per unit area was reduced by 46.39% after 30 thermal cycles between 1600 °C and room temperature. The performance enhancement can be attributed to the improved bonding strength and the alleviation of mismatch of thermal expansion coefficient between C/C substrate and Si-Mo-Cr coating, thereby decreasing the thermal stress during thermal cycles between high and low temperatures.