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首页> 外文会议>Proceedings of the 3rd Sino-Italian conference on space aerothermodynamics and hot structures >Ablation resistance evaluation of SiC coatings in low temperature
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Ablation resistance evaluation of SiC coatings in low temperature

机译：低温下SiC涂层的耐烧蚀性能评估

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摘要

SiC has potential application in thermal protection system(TPS)of hypersonic vehicles and reusable space vehicles due to its strength,stiffiless，toughness and chemical compatibility．In this work,two kinds of SiC coatings，atmospheric plasma spraying and diffusion reacting SiC coatings，ale deposited on carbon／carbon(c／c) substrate and their ablation resistance is evaluated in an arc-jet test facility at temperature of 1400-18000C，below the decomposition temperature of SiC．The experimental results indicates that，the atmospheric plasma spraying SiC coating shows continuous，uniform,and intact distribution．During ablation test，This coating possesses good ablation resistance and cart protect C／C substrate effective fi'om ablation damage，while the discontinuous coating is severely eroded during exposure．The intact SiC coating also display a lower mass loss and stagnation point temperature．Therefore，all continuous，uniform，and intact SiC coating is one ofthe candidate protect coatings for thermal structures in hypersonic vehities．
机译：SiC的强度，刚度，韧性和化学相容性使其在高超音速飞行器和可重复使用的航天器的热保护系统（TPS）中具有潜在的应用。本工作中，有两种SiC涂层，常压等离子体喷涂和扩散反应SiC涂层。沉积在碳/碳（c / c）衬底上，并在电弧喷射测试设备中在低于SiC分解温度1400-18000C的温度下评估其耐烧蚀性。实验结果表明，大气等离子喷涂SiC涂层表现出连续，均匀和完整的分布。在烧蚀试验中，该涂层具有良好的抗烧蚀性，可有效保护C / C基材免受烧蚀损害，而不连续涂层则在曝光过程中受到严重侵蚀。因此，所有连续，均匀且完整的SiC涂层都是最适合的保护涂层之一高超声速车辆的热结构。

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