Effect of Bond Coats on Thermal Shock Resistance of Thermal Barrier Coatings Deposited Onto Polymer Matrix Composites Via Air Plasma Spray Process

• Published in: Journal of thermal spray technology Vol. 22; no. 6; pp. 918 - 925
• Main Authors: Huang, Wenzhi, Zhao, Yu, Fan, Xizhi, Meng, Xiangsheng, Wang, Ying, Cai, Xiaolong, Cao, Xueqiang, Wang, Zhen
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.08.2013; Springer
• Subjects: Analytical Chemistry; Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Exact sciences and technology; Machines; Manufacturing; Materials Science; Metals. Metallurgy; Nonmetallic coatings; Peer Reviewed; Processes; Production techniques; Surface treatment; Surfaces and Interfaces; Thin Films; Tribology; X-ray diffraction; interfaces; polymers; failure; Plasma; Hot spraying; Polymer; Air; Non metal coating; Thermal barrier; X ray diffraction; Composite material; Surface treatment; Thermal shock resistance; Thermal shock; Plasma spraying; Interface
• ISSN: 1059-9630; 1544-1016
• DOI: 10.1007/s11666-013-9942-7

Thermal barrier coating systems with different bond coats were fabricated on polymer matrix composites via the air plasma spray process. During a thermal shock test at 400 °C, Zn and Al interlayers were helpful in improving the thermal shock resistance of coatings due to the low melting point. The coating system consisted of a soft zinc layer as a bond coat, and YSZ as a top coat exhibited the best thermal shock resistance, attributed to the lower residual stress and lower thermal stress in the Zn interlayer. The failure mechanism of the coating system was mainly ascribable to the residual stress derived from the deposition process, thermal stress, and further damage of the substrate.