Structural Engineering and Mechanics

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Numerical analysis of plasma-sprayed ceramic coatings for high-temperature applications

  • St. Doltsinis, Ioannis (Institute for Computer Applications, University of Stuttgart) ;
  • Haller, Kai-Uwe (Institute for Computer Applications, University of Stuttgart) ;
  • Handel, Rainer (Institute for Computer Applications, University of Stuttgart)
  • Published : 1996.11.25
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Abstract

The finite element method is employed in conjunction with micromechanical modelling in order to assess the performance of ceramic thermal barrier coatings applied to structural components. The study comprises the conditions of the deposition of the coating by plasma spraying as well as the thermal cycling of the coated component, and it addresses particularly turbine blades. They are exposed to high temperature changes strongly influencing the behaviour of the core material and inducing damage in the ceramic material by intense straining. A concept of failure analysis is discussed starting from distributed microcracking in the ceramic material, progressing to the formation of macroscopic crack patterns and examining their potential for propagation across the coating. The theory is in good agreement with experimental observations, and may therefore be utilized in proposing improvements for a delayed initiation of failure, thus increasing the lifetime of components with ceramic thermal barrier coatings.

Keywords

References

  1. Barsoum, R.S. (1976), "On the use of isoparametric finite elements in linear fracture mechanics", Int. J. Num. Meth. Engng., 10, 25-37. https://doi.org/10.1002/nme.1620100103
  2. Buresch, F.E. (1985), "Relations between the damage in and microstructure of ceramics", Materials Science and Engineering, 71, 187-194. https://doi.org/10.1016/0025-5416(85)90229-0
  3. Davidge, R.W., Mc Laren, J.R. and Titchell, I. (1983), "Statistical aspects of grain boundary cracking in ceramics and rocks", Fracture Mechanics of Ceramics, 5, 495-506.
  4. Doltsinis, I.St., Eggers, M. and Handel, R. (1992), "Properties of thin ceramic layers", in Modelling and characterization of the manufacturing process of ceramic thermal barrier coating, BRITE/EU-RAM Project BE-4212-90, 1st Progress Report, ICA-Stuttgart.
  5. Doltsinis, I.St. (1993), "Coupled field problems - Solution techniques for sequential and parallel processing", in Solving Large-Scale Problems in Mechanics, edited by M. Papafrakakis, Wiley.
  6. Doltsinis, I.St. (1979), "Zur Berechnung des Rissvortschritts in inelastischen Tragwerken", ZAMP, 30, 57-64. https://doi.org/10.1007/BF01597480
  7. Doltsinis, I.St., Eggers, M., Haller, K.-U. and Handel, R. (1995), "Finite element modelling of ceramic thermal barrier coatings to extend the operating range of heat engine components", BRITE/EURAM Project BE-4272-90, 6th Progress Report, ICA-Stuttgart.
  8. Doltsinis, I.St. (1990), "Aspects of modelling and computation in the analysis of metal forming", Engineering Computations, 7, 2-20. https://doi.org/10.1108/eb023789
  9. Doltsinis, I.St., Knapp, H., Streiner, P. and Wustenberg, H. (1979), "ASKA-FM, fracture mechanics", ASKA UM 226, ISD-Stuttgart.
  10. Kachanov, M. (1992), "Effective elastic properties of cracked solids: critical review of some basic concepts", in Micromechanical Modelling of Quasi-brittle Behaviour; edited by V.C.L. Li, Appl. Mech. Rev., 45, 304-335. https://doi.org/10.1115/1.3119761
  11. Kachanov, M. (1987), "Elastic solids with many cracks: A simple method of analysis", Int. J. Solids and Structures, 23, 23-43. https://doi.org/10.1016/0020-7683(87)90030-8
  12. Modelcoat (1994), "Finite element modelling of ceramic thermal barrier coatings to extend the operative range of heat engine components", BRITE/EURA7 Project BE-4272-90, 4th Progress Report, ICA-Stuttgart.
  13. Wustenberg, H. (1986), "FEPS 3.3. Finite Element Programming System: User's Guide", ICA Report 21. and "FEPS 3.3.: Element Library", ICA Report No. 22, Stuttgart. User's
  14. Zaat, J.H. (1983), "A quarter of century of plasma spraying", Annual Review of Material Science, 13, 9-42. https://doi.org/10.1146/annurev.ms.13.080183.000301

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  3. Coatings and surface modification technologies: a finite element bibliography (1995–2005) vol.13, pp.6, 2005, https://doi.org/10.1088/0965-0393/13/6/011
  4. Finite element modelling of ceramics and glass vol.16, pp.5, 1999, https://doi.org/10.1108/02644409910277915
  5. Mathematical simulation of surface heating during plasma spraying vol.177, 2017, https://doi.org/10.1088/1757-899X/177/1/012057
  6. Finite element and boundary element modelling of surface engineering systems vol.34, pp.1, 2000, https://doi.org/10.1016/S0168-874X(99)00023-2
  7. Bibliography (1995–2005) of surface modification process simulations vol.13, pp.6, 1996, https://doi.org/10.1088/0965-0393/13/6/11b