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C/C复合材料表面等离子喷涂ZrO2/SiO2涂层的组织结构及抗烧蚀性能

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  • 1中国航发北京航空材料研究院先进复合材料国防科技重点实验室; 2北京理工大学冲击环境材料技术国家级重点实验室

网络出版日期: 2025-07-08

Microstructure and Anti - Ablation Property of Plasma Sprayed ZrO2/SiO2 Coating on C/C Composites

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  • 1. National Key Laboratory of Advanced Composites, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;2. National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing Institute of Technology,Beijing 100081,China

Online published: 2025-07-08

摘要

为了提高C/C复合材料的抗氧化性能,采用大气等离子喷涂(APS)法在C/C表面制备ZrO2/SiO2复合涂层,选用氧乙炔在1 450, 1 700, 2 000 ℃下对涂层进行烧蚀考核,并对团聚粉体以及烧蚀前后涂层的成分及组织进行分析。结果表明:大气等离子喷涂虽然可以实现C/C基体表面ZrO2/SiO2复合涂层的制备,但是由于2种材料熔点差异较大导致粉体熔融不充分,涂层孔隙率为40.12%,涂层结合强度为12.1 MPa。ZrO2/SiO2复合涂层抗烧蚀性能表现较好,其防护机理随温度的增加可以分为2个阶段:低温阶段,SiO2熔化并起到封填愈合作用,提高了致密度,ZrO2逐渐形成骨架,支撑液态SiO2;高温阶段,SiO2逐渐蒸发损耗,涂层中仅剩ZrO2并且发生烧结,继续起到抗氧化烧蚀的作用。

本文引用格式

孙世杰, 马壮, 柳彦博, 焦健, 焦春荣, 杨金华 . C/C复合材料表面等离子喷涂ZrO2/SiO2涂层的组织结构及抗烧蚀性能[J]. 材料保护, 2021 , 54(7) : 9 . DOI: 10.16577/j.cnki.42-1215/tb.2021.07.002

Abstract

 In order to improve the oxidation resistance of C/C composites, ZrO2/SiO2 coatings were prepared on the surface of C/C composites by atmospheric plasma spraying(APS), and oxyacetylene test was proceeded at 1 450, 1 700, 2 000 ℃ to evaluate the anti-ablation performance of the coating. In addition, the composition and microstructure of the agglomerated powder and coating before and after ablation treatment were detected. Results showed that atmospheric plasma spraying was a feasible method to prepare ZrO2/SiO2 coating on the C/C substrates surface. However, due to the huge difference of the melting point between ZrO2 and SiO2, the powders were hardly melting sufficiently causing 40.12% porosity of the coating, and the binding strength of the coating was 12.1 MPa. The ablation resistance of ZrO2/SiO2 composite coating was good. With the increase of temperature, the protection mechanism of ZrO2/SiO2 composite coating could be divided into two stages: in the low temperature stage, SiO2 melted and sealed to the healing effect, the density was increased, and ZrO2 gradually formed a skeleton and supported liquid SiO2. In the high temperaturestage stage, the SiO2 gradually evaporated and lost, and only ZrO2 remained in the coating and sintered, which continued to play a role of anti-oxidation ablation.
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