Heat dissipation of carbon shell in ZrC-SiC/TaC coating to improve protective ability against ultrahigh temperature ablation  

作　　者：Yuyu Zhang Xuemeng Zhang Hongkang Ou Bozhe Wang Jia Sun Qiangang Fu 

机构地区：[1]Science and Technology on Thermostructural Composite Materials Laboratory,Shaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites,Northwestern Polytechnical University,Xi’an 710072,China [2]System Design Institute of Hubei Aerospace Technology Academy,Wuhan 430040,China

出　　处：《Journal of Advanced Ceramics》2024年第7期1080-1091,共12页先进陶瓷（英文）

基　　金：supported by the National Key R&D Program of China(Nos.2022YFB3708600 and 2021YFA0715802);the National Natural Science Foundation of China(No.52101098);the Aeronautical Science Foundation of China(No.2022Z055053004);the Fund of Key Laboratory of National Defense Science and Technology(No.WDZC20235250505);the National Science and Technology Major Project(No.J2022-VI0011-0042);the National Basic Scientific Research(No.JCKY2021607B035);Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(No.CX2024006).

摘　　要：To efficiently decrease ablation heat accumulation and improve the ability of ZrC-SiC/TaC coatings to protect carbon/carbon(C/C)composites,a thermally conductive nanonetwork with a ceramic@carbon core-shell structure was designed and constructed.Polymer-derived SiC/TaC with a graphene carbon shell was synthesized and introduced into a ZrC coating by supersonic atmospheric plasma spraying(SAPS).Graphene shell paths increased the heat transfer capability by lowering the surface temperature to approximately 200℃during oxyacetylene ablation.The heat dissipation of the graphene shell in the ZrC-SiC/TaC@C coating reduced the volatilization of low-melting-point phases and delayed the sintering of ZrO_(2) particles.Thus,the graphene shell in ZrC-SiC/TaC@C coating decreased the mass and linear ablation rates by 91.4%and 93.7%compared to ZrC-SiC/TaC coating,respectively.This work provided a constructive idea for improving the ablation resistance of the coatings by incorporating carbon nanomaterials as a function of heat dissipation.

关 键 词：carbon/carbon(C/C)composites carbon nanomaterials core-shell structure polymer-derived ceramic(PDC) ablation resistance 

分 类 号：V25[一般工业技术—材料科学与工程] TB306[航空宇航科学与技术—航空宇航制造工程]