Effect of Substrate Conditions on Residual Stresses of Plasma-Spraying YSZ / Sm₂Zr₂O₇ Thermal Barrier Coatings

Abstract:

Effect of substrate conditions, including material type, thickness and radius of substrate, on residual stresses of plasma spraying YSZ / Sm₂Zr₂O₇ TBCs was analyzed through finite element method in this paper. Results show that all residual stresses increse with incresing of thermal expansion coefficient of substrate.Substrate thickness has slight effect on radial residual stress, and it has no effect on axial residual stress and shear stress. Effect of substrate radius on radial stresses can be almost neglected when it is over 18mm. Effect of substrate radius on axial stresses can also be ignored.

• Periodical: Advanced Materials Research (Volumes 354-355)
• Pages: 29-32
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.354-355.29
• Online since: October 2011
• Authors: Hong Song Zhang, Yuan Wei, Shu Sen Yang
• Keywords: Finite Element Method (FEM), Residual Stress, Substrate Conditions, Thermal Barrier Coating (TBC)

References

[1] N. P. Padture, M. Gell, E. H. Jordan: Sci Vol. 4 (2002), p.280

[2] O. Sarikaya, E. Celik: Mater. Design Vol. 23 (2002), p.645

[3] Cao. X. Qiang, R. Vassen, D. Stover: J. Eur. Ceram. Soc Vol. 24 (2004), p.1

[4] Z. G. Liu, J. H. Ouyang, Y. Zhou: J. Mater. Sci Vol. 43 (2008), p.3596

[5] X. Q. Cao, R. Vassen, F. Tietz: J. Eur. Ceram. Soc Vol. 26 (2006), p.247

[6] H. Dai, X. H. Zhong, J. Y. Li: Mater. Sci. Eng Vol. A433 (2006), p.1

[7] L. M. He, Z. H. Xu: Vacuum Vol. 83 (2009), p.1388

[8] Z. H. Xu, L. M. He, R. D. Mu: App. Surf. Sci Vol. 256 (2010), p.3661

[9] M. Ferrari, J. H. Harding, M. Marchese: Surf. Coat. Technol Vol. 48 (1991), p.147

[10] K. A. Khor, Y. W. Gu: Mater. Sci. Eng Vol. A277 (2000), p.64

[11] K. kokini, Y. R. Takeuchi, B. D. Choules: Surf. Coat. Technol Vol. 82 (1996), p.77

[12] Y. Q. Wang, G. Sayre: Surf. Coat. Technol Vol. 203 (2009), p.2186