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Nanofiber toughened silicon carbide surface environment barrier ceramic coating and preparation method thereof
The invention discloses a nanofiber toughened silicon carbide surface environment barrier ceramic coating and a preparation method thereof, and belongs to the field of coating preparation, the thermal adaptability of rare earth zirconate (hafnium) and a matrix is improved by introducing YAG, and the rare earth zirconate (hafnium) can play a part of microcrack healing effect in a long-time high-temperature thermal protection stage compared with a low-melting-point rare earth zirconate (hafnium); meanwhile, oxidation products of SiC, zirconium-hafnium oxide and YAG components form a high-temperature solid solution, so that cracks can be effectively healed, and permeation of oxygen is prevented; in addition, the introduction of the YAG nanofibers and the composite coating containing the YAG coating have good chemical compatibility, a compact coating can be formed, and the toughness of the composite coating is improved, so that the high-temperature stability of the nanofiber toughened composite coating is improved. The coating can play a role in effectively resisting oxygen and insulating heat, and the service life of SiC and the composite material is prolonged.
本发明公开了一种纳米纤维增韧碳化硅表面环境屏障陶瓷涂层及其制备方法，属于涂层制备领域，YAG的引入提高了稀土锆(铪)酸盐和基体的热适配性，相比低熔点的它在长时间高温热防护阶段可以起到部分微裂纹愈合的作用；同时SiC的氧化产物与锆铪氧化物、YAG组分形成高温固溶体可有效愈合裂纹，阻止氧气的渗入；另外YAG纳米纤维的引入和含YAG涂层的复合涂层有着良好的化学相容性，可以形成较为致密的涂层，提高复合涂层的韧性，从而提高纳米纤维增韧复合涂层的高温稳定性。该涂层能够起到有效阻氧隔热的作用，延长SiC及复合材料的使用寿命。
Nanofiber toughened silicon carbide surface environment barrier ceramic coating and preparation method thereof
The invention discloses a nanofiber toughened silicon carbide surface environment barrier ceramic coating and a preparation method thereof, and belongs to the field of coating preparation, the thermal adaptability of rare earth zirconate (hafnium) and a matrix is improved by introducing YAG, and the rare earth zirconate (hafnium) can play a part of microcrack healing effect in a long-time high-temperature thermal protection stage compared with a low-melting-point rare earth zirconate (hafnium); meanwhile, oxidation products of SiC, zirconium-hafnium oxide and YAG components form a high-temperature solid solution, so that cracks can be effectively healed, and permeation of oxygen is prevented; in addition, the introduction of the YAG nanofibers and the composite coating containing the YAG coating have good chemical compatibility, a compact coating can be formed, and the toughness of the composite coating is improved, so that the high-temperature stability of the nanofiber toughened composite coating is improved. The coating can play a role in effectively resisting oxygen and insulating heat, and the service life of SiC and the composite material is prolonged.
本发明公开了一种纳米纤维增韧碳化硅表面环境屏障陶瓷涂层及其制备方法，属于涂层制备领域，YAG的引入提高了稀土锆(铪)酸盐和基体的热适配性，相比低熔点的它在长时间高温热防护阶段可以起到部分微裂纹愈合的作用；同时SiC的氧化产物与锆铪氧化物、YAG组分形成高温固溶体可有效愈合裂纹，阻止氧气的渗入；另外YAG纳米纤维的引入和含YAG涂层的复合涂层有着良好的化学相容性，可以形成较为致密的涂层，提高复合涂层的韧性，从而提高纳米纤维增韧复合涂层的高温稳定性。该涂层能够起到有效阻氧隔热的作用，延长SiC及复合材料的使用寿命。
Nanofiber toughened silicon carbide surface environment barrier ceramic coating and preparation method thereof
纳米纤维增韧碳化硅表面环境屏障陶瓷涂层及其制备方法
GU SHENGYUE (author) / XUE BEI (author) / ZHANG YAMING (author) / ZHOU QIAN (author) / LI DING (author) / XU JIANGANG (author) / ZHANG YUNGUANG (author) / YAO GUOGUANG (author) / REN WEI (author) / JIA YANMIN (author)
2022-03-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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