Peer Reviewed

Journal of Thermal Spray Technology

, Volume 22, Issue 6, pp 918-925

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

  • Wenzhi HuangAffiliated withState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesGraduate School of the Chinese Academy of Sciences
  • , Yu ZhaoAffiliated withState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesGraduate School of the Chinese Academy of Sciences
  • , Xizhi FanAffiliated withState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesGraduate School of the Chinese Academy of Sciences
  • , Xiangsheng MengAffiliated withState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesGraduate School of the Chinese Academy of Sciences
  • , Ying WangAffiliated withState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
  • , Xiaolong CaiAffiliated withState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
  • , Xueqiang CaoAffiliated withState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Email author 
  • , Zhen WangAffiliated withState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Email author 

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Abstract

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.

Keywords

failure interfaces polymers X-ray diffraction