Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SiCf/SiC composite material with ultrahigh-temperature ceramic gradient coating as well as preparation method and application of SiCf/SiC composite material
The invention discloses a SiCf/SiC composite material with an ultrahigh-temperature ceramic gradient coating as well as a preparation method and application of the SiCf/SiC composite material. The (Hf, Si, Ta) C gradient composite coating is prepared on the surface of the SiCf/SiC composite material by adopting a double glow plasma surface metallurgy method, and the coating can effectively protect the SiCf/SiC composite material in a 1773K oxygen atmosphere. The method has the specific advantages that (1) the substrate is subjected to ion bombardment, so that the point defect and the conductivity of the composite material substrate are remarkably improved; (2) the (Hf, Si, Ta) C coating has a continuous gradient structure, good metallurgical bonding is formed between the coating and the substrate, and the bonding strength is high; (3) the thermal expansion coefficient of the (Hf, Si, Ta) C coating is similar to the thermal expansion coefficient of the substrate, so that the thermal mismatch between the coating and the substrate can be improved, and the peeling and cracking tendency of the coating in the service process can be reduced; and (4) the (Hf, Si, Ta) C coating system has high service temperature and self-healing capability. The prepared coating has excellent high-temperature protection performance, the high-temperature service life of the SiCf/SiC composite material is prolonged, and the coating has wide application prospects in the field of aerospace.
本发明公开了一种具有超高温陶瓷梯度涂层的SiCf/SiC复合材料及其制备方法与应用。采用双层辉光等离子表面冶金方法在SiCf/SiC复合材料表面制备(Hf,Si,Ta)C梯度复合涂层，该涂层能够在1773K氧气气氛下对SiCf/SiC复合材料进行有效的保护。本发明具体优势为：（1）对基底进行离子轰击，显著提高复合材料基底的点缺陷和导电性；（2）(Hf,Si,Ta)C涂层具有连续梯度结构，涂层与基底之间形成良好冶金结合，结合强度高；（3）(Hf,Si,Ta)C涂层与基底相近的热膨胀系数能够改善涂层与基底之间的热失配，减少服役过程中涂层剥落和开裂的倾向；（4）(Hf,Si,Ta)C涂层体系较高的服役温度与自愈合能力。本发明制备的涂层具有优异的高温防护性能，提高了SiCf/SiC复合材料的高温服役寿命，在航空航天领域具有广泛的应用前景。
SiCf/SiC composite material with ultrahigh-temperature ceramic gradient coating as well as preparation method and application of SiCf/SiC composite material
The invention discloses a SiCf/SiC composite material with an ultrahigh-temperature ceramic gradient coating as well as a preparation method and application of the SiCf/SiC composite material. The (Hf, Si, Ta) C gradient composite coating is prepared on the surface of the SiCf/SiC composite material by adopting a double glow plasma surface metallurgy method, and the coating can effectively protect the SiCf/SiC composite material in a 1773K oxygen atmosphere. The method has the specific advantages that (1) the substrate is subjected to ion bombardment, so that the point defect and the conductivity of the composite material substrate are remarkably improved; (2) the (Hf, Si, Ta) C coating has a continuous gradient structure, good metallurgical bonding is formed between the coating and the substrate, and the bonding strength is high; (3) the thermal expansion coefficient of the (Hf, Si, Ta) C coating is similar to the thermal expansion coefficient of the substrate, so that the thermal mismatch between the coating and the substrate can be improved, and the peeling and cracking tendency of the coating in the service process can be reduced; and (4) the (Hf, Si, Ta) C coating system has high service temperature and self-healing capability. The prepared coating has excellent high-temperature protection performance, the high-temperature service life of the SiCf/SiC composite material is prolonged, and the coating has wide application prospects in the field of aerospace.
本发明公开了一种具有超高温陶瓷梯度涂层的SiCf/SiC复合材料及其制备方法与应用。采用双层辉光等离子表面冶金方法在SiCf/SiC复合材料表面制备(Hf,Si,Ta)C梯度复合涂层，该涂层能够在1773K氧气气氛下对SiCf/SiC复合材料进行有效的保护。本发明具体优势为：（1）对基底进行离子轰击，显著提高复合材料基底的点缺陷和导电性；（2）(Hf,Si,Ta)C涂层具有连续梯度结构，涂层与基底之间形成良好冶金结合，结合强度高；（3）(Hf,Si,Ta)C涂层与基底相近的热膨胀系数能够改善涂层与基底之间的热失配，减少服役过程中涂层剥落和开裂的倾向；（4）(Hf,Si,Ta)C涂层体系较高的服役温度与自愈合能力。本发明制备的涂层具有优异的高温防护性能，提高了SiCf/SiC复合材料的高温服役寿命，在航空航天领域具有广泛的应用前景。
SiCf/SiC composite material with ultrahigh-temperature ceramic gradient coating as well as preparation method and application of SiCf/SiC composite material
一种具有超高温陶瓷梯度涂层的SiCf/SiC复合材料及其制备方法与应用
MIAO QIANG (Autor:in) / JIA FEILONG (Autor:in) / LIANG WENPING (Autor:in) / LIN HAO (Autor:in) / LIU RUIXIANG (Autor:in) / QI YAN (Autor:in) / ZHAO HUI (Autor:in) / GAO JIUMEI (Autor:in) / CHANG XIANGLE (Autor:in)
24.09.2024
Patent
Elektronische Ressource
Chinesisch
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