Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels
Optimized ablation resistance behavior and mechanism of C/SiC composites with high thermal conductive channels
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DOI：
10.1111/jace.19281
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发表时间：
2023-06
影响因子：
3.9
通讯作者：
Yejie Cao;Yunhai Zhang;Yongsheng Liu;Liyang Cao;Xiongjian Shao;Jing Wang
中科院分区：
文献类型：
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作者：
Yejie Cao;Yunhai Zhang;Yongsheng Liu;Liyang Cao;Xiongjian Shao;Jing Wang
为了提高高速飞机热防护系统中C/SiC复合材料的高温使用性能，本文采用沥青基碳纤维构建高导热通道，以提高C/SiC复合材料的换热性能。结果表明，制备的复合材料的导热系数是传统C/SiC复合材料的4.7倍。氧-乙炔火焰烧蚀试验证实，所构建的高导热通道快速地将热流从烧蚀中心区域传导到其他区域，是所制备的复合材料表现出非常出色的耐烧蚀性能的主要原因。与常规C/SiC复合材料相比，制备的复合材料表面烧蚀温度降低了约300℃，线烧蚀速率为1.27m/μm/S，质量烧蚀速率为0.61m g/S，优于最近的许多报道，为提高C/SiC复合材料的耐烧蚀性能提供了一种简单而高效的措施。
Aimed to enhance the high‐temperature service performance of C/SiC composites in high‐speed aircraft thermal protection system, in this article, pitch‐based carbon fibers were used to construct high thermal conductive channels to improve the heat transfer capability of C/SiC composites. The results revealed that the as‐prepared composites equipped with 4.7 times higher thermal conductivity than that of conventional C/SiC composites. The oxyacetylene flame ablation test confirmed that the constructed high thermal conductive channels, which quickly conducted the heat flow from the ablation center area to other areas is the main reason of as‐prepared composites exhibiting a very impressive ablation resistance property. Briefly, the ablation temperature of the as‐prepared composite surfaces considerably dropped by about 300°C compared with conventional C/SiC composites, while the linear ablation rate and mass ablation rate of the composites are 1.27 μm/s and 0.61 mg/s respectively, which is superior to many recent reports, demonstrating that this article provides a simple but highly effective measure to improve the ablation resistance property of C/SiC composites.