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采用大气等离子喷涂(APS)技术,在TC4基体上制备出一种类似“钢筋混凝土”结构碳纤维增强的氧化锆热障烧蚀复合厚涂层,并用等离子火炬对涂层进行模拟烧蚀隔热试验,采用扫描电镜(SEM)、X射线能谱分析(EDS)等测试方法对涂层烧蚀前后的表面形貌、纤维状态进行了观察,对部分结构、成分进行了确定。研究结果表明,经过纤维增强的复合涂层可制得的厚度要远大于传统的复合涂层,其烧蚀隔热作用也较传统热障涂层有明显提高。
Atmospheric plasma spray (APS) technique was used to fabricate a thick composite coating of zirconia thermal barrier ablated on a TC4 substrate with “RC” carbon fiber reinforced structure and plasma ablation with a plasma torch The surface morphology and fiber state of the coating before and after ablation were observed by SEM, EDS and other testing methods. Some structures and components were determined. The results show that the thickness of the fiber-reinforced composite coating can be much larger than that of the traditional composite coating, and the ablation and thermal insulation effect is obviously improved compared with the traditional thermal barrier coating.