Numerical Simulation of Initial Residual Stress in Thermal Barrier Coatings: Planar geometry model
DOI:
https://doi.org/10.54097/ajst.v2i2.1295Keywords:
Thermal barrier coatings, Initial residual stress, Finite element method.Abstract
Thermal barrier coatings (TBCs) are one of the key materials of turbines for propulsion and power generation. A typical TBCs system generally contains four layers, i.e. top ceramic coat (TC), thermally grown oxide (TGO), bond coat (BC) and substrate. The material parameters （such as Young’s modulus, Poisson’s ratio and thermal expansion coefficient） of each layer will result in the different cooling velocity of thermal barrier coatings (TBCs) system during the deposition process. Initial residual stresses in TBCs occur after cooling to the ambient, which play an important role for evaluating the failure and reliability of TBCs. In this paper, the initial residual stresses of a planar TBCs model were obtained by finite element method, the effects of cooling kinds and the thickness of TC and TGO on the fields of initial residual stresses were also considered. The results may be useful for the optimization of TBCs system design and preparation.
Downloads
References
N. P. Padture, M. Gell, E. H. Jordan, Thermal Barrier Coatings for Gas-Turbine Engine Applications. Science, 2002, 296: 280-284.
R. A. Miller, Current status of thermal barrier coatings-an overview. Surface and Coatings Technology, 1987, 30: 1-11.
R. A. Miller, Thermal barrier coatings for aircraft engines: history and directions. Journal of Thermal Spray Technology, 1997, 6（1）: 35-42.
S. M. Meier, D. K. Gupta, The Evolution of Thermal Barrier Coating in Gas Turbine Engine Applications. Journal of Engineering for Gas Turbines and Power, 1994, 116: 250-257.
X. G. Yang，R. Gen, C. B. Xiong, A simple method for residual stress analysis of thermal insulation coating and Discussion on the results, Journal of Aerospace Power, 1997, 12（3）: 239-142.
D. F. Yang, S. Han, W. Yuan, Study on the influences of the substrate preheating temperature on the thermal residual stress of the thermal barrier coating, Surface Technology, 2004, 33（2）: 22-28.
W. G. Mao, C. Y. Dai, Y. C. Zhou, Prediction of qresidual stress in thermal barrier coating during the deposition process, 2005, 27(4): 46-52.
V. Teixeira, M. Andritschky, H. P. Buchkremer, D. Stöver, Effects of deposition temperature and thermal cycling on residual stress state in zirconia-based thermal barrier coatings. Surface and Coatings Technology, 1999, 120: 103-111.
J. H. Harding, P. A. Mulheran, S. Cirolini, M. Marchese, G. Jacucci, Modeling the deposition process of thermal barrier coatings. Journal of Thermal Spray Technology, 1995, 4（1）:34-40.
V. Teixeira, Mechanical integrity in PVD coatings due to the presence of residual stresses. Thin Solid Films, 2001, 392: 276-281.
S. Widjaja, A. M. Limarga, T. H. Yip, Modeling of residual stresses in a plasma-sprayed zirconia/alumina functionally graded-thermal barrier coating. Thin Solid Films, 2003, 434: 216-227.
A. Rabiei, A. G. Evans, Failure mechanisms associated with the thermally grown oxide in plasma-sprayed thermal barrier coatings. Acta Materialia, 2000, 48: 3963-3976.
S. Sridharan, L. Xie, E. H. Jordan, M. Gell, Stress variation with thermal cycling in the thermally grown oxide of an EB-PVD thermal barrier coating. Surface and Coatings Technology, 2004, 179（2）: 286-296.
Y. C. Zhou, T. Hashida, Thermal fatigue failure induced by delamination in thermal barrier coating. International Journal of Fatigue, 2002, 24: 407-417.
W. G. Mao, Y. C. Zhou, L. Yang, X. H. Yu, Modeling of residual stresses variation with thermal cycling in thermal barrier coating. Mechanics of Materials, 2006, 38: 1118-1127.
J. Haidera, M. Rahmana, B. Corcoranb, M. S. J. Hashmia, Simulation of thermal stress in magnetron sputtered thin coating by finite element analysis. Journal of Materials Processing Technology, 2005, 168: 36-41.
Downloads
Published
Issue
Section
How to Cite
