Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (12): 1381-1386.DOI: 10.3724/SP.J.1077.2013.13272

• Research Letter • Previous Articles    

Experimental and Numerical Investigation of Residual Stresses in Plasma-sprayed Thermal Barrier Coatings

YANG Jia-Sheng1, 2, 3, YU Jian-Hua4, ZHONG Xing-Hua1, 2, ZHAO Hua-Yu1, 2, ZHOU Xia-Ming1, 2, TAO Shun-Yan1, 2, DING Chuan-Xian1,2   

  1. (1. Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai 201899, China; 2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
  • Received:2013-05-20 Revised:2013-06-16 Published:2013-12-20 Online:2013-11-15
  • Contact:
  • About author:YANG Jia-Sheng(1987-), male, candidate of master degree.
  • Supported by:

    National Natural Science Foundation of China (51202277)

Abstract: Finite element analysis (FEA) was performed to analyze residual stresses development within thermal barrier coatings system consisting vacuum plasma sprayed CoNiCrAlY bondcoat and atmospheric plasma sprayed yttria partially stabilized zirconia topcoat on the GH3128 nickel-based superalloy substrates. The effect of substrate preheating process on the residual stress generated at the bondcoat/topcoat interface was evaluated. The results show that substrate preheating process reduces tensile stresses within the coating. To provide quantitatively comparison to the computational results, hole-drilling method was used to evaluate the residual stresses. The measured residual stresses are in agreement with the numerical simulation results obtained from FEA.

Key words: thermal barrier coating, plasma spraying, residual stress, finite element analysis

CLC Number: