Fabrication of thermal barrier coatings onto polyimide matrix composites via air plasma spray process
Fabrication of thermal barrier coatings onto polyimide matrix composites via air plasma spray process
复制标题
通过空气等离子喷涂工艺在聚酰亚胺基复合材料上制备热障涂层
DOI：
10.1016/j.surfcoat.2012.07.042
复制
发表时间：
2012-08-25
影响因子：
5.4
通讯作者：
Wang, Zhen
中科院分区：
文献类型：
--
作者：
Huang, Wenzhi;Fan, Xizhi;Wang, Zhen
采用空气等离子喷涂技术在聚酰亚胺基复合材料表面制备了热障涂层。采用粉末X射线衍射仪和扫描电子显微镜对试验前后涂层的相结构和组织演变进行了表征。在400 ℃的热震试验中，涂层系统的热震寿命随着Al层厚度的减小而增加，随着YSZ层厚度的增加而增加。由30 μ m Al粘结层和130 μ m YSZ顶层组成的涂层体系具有最佳的抗热震性。同时，由于涂层系统的保护，试样的失重率从7.05%降低到1.90%，相应的质量烧蚀率从0.48 mg s（-1）降低到0.21 mg s（-1）。涂层失效的主要原因是沉积过程中的残余应力、基体的氧化和热膨胀失配引起的热应力。皇冠版权所有（C）2012由Elsevier B. V.出版。保留所有权利。
Thermal barrier coatings were fabricated on polyimide matrix composites via air plasma spray process. The phase structures and microstructural evolution of the coatings before and after testing were characterized by powder X-ray diffraction and scanning electron microscopy. During thermal shock test at 400 degrees C, thermal shock lifetime of the coating systems increased with the decrease of thickness of Al layer as well as the increase in that of YSZ layer. The coating system consisted of 30 mu m Al bond layer and 130 mu m YSZ top layer exhibited the best thermal shock resistance. Meanwhile, owing to the protection of the coating system, the weight loss of the sample decreased from 7.05% to 1.90%, while the corresponding mass ablation rate reduced from 0.48 mg s(-1) to 0.21 mg s(-1). Failure mechanism of the coatings was mainly ascribable to the residual stress during deposition, oxidation of substrate and thermal stress induced by mismatch in thermal expansion. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.