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Modelling the stress state of a thermal barrier coating system at high temperatures

  • Jochen Schwarzer , Katharina E. Rostek , Tilmann Beck EMAIL logo , Detlef Löhe and Otmar Vöhringer
Published/Copyright: February 16, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 96 Issue 7

Abstract

A model is proposed to assess the time- and temperaturedependent creep and oxidation behavior of typical thermal barrier coating (TBC) systems consisting of EB-PVD manufactured partially stabilized ZrO2 and a plasma-sprayed MCrAlY bond coat (BC) on a typical Ni-base sheet alloy. The creep behavior of the BC was investigated by compression tests at the NiCoCrAlY alloy PWA 1370. With the objective of describing the formation of the so-called thermally grown oxide, an oxidation kinetic for the BC alloy is presented, which predicts the oxide thickness as a function of time and temperature. Using a finite element model of the complete TBC system, the influence of time- and temperature- dependent oxide growth and deformation behavior of the components on the stress development was studied. The obtained results show a development of compressive stresses above the peaks and of tensile stresses in the valleys of the rough TBC/BC interface. With this, the delamination stress between top coat and BC, which finally leads to failure by spallations, can be assessed.

Keywords: Thermal barrier coating; Bond coat; Thermally grown oxide; Creep behavior; Oxidation kinetic; Delamination stress; Finite element modelling
Dr.-Ing. Tilmann Beck Institut für Werkstoffkunde I, Universität Karlsruhe (TH) Kaiserstraße 12, D-76131 Karlsruhe, Germany Tel.: +49 721 608 4159 Fax: +49 721 608 7451

Dedicated to Professor Dr.-Ing. habil. Dr. h. c. Heinrich Oettel on the occasion of his 65th birthday

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Received: 2004-10-08
Accepted: 2004-12-23
Published Online: 2022-02-16

© 2005 Carl Hanser Verlag, München

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  2. Editorial
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  12. Diffraction by image processing and its application in materials science
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  25. Effect of preaging on the precipitation behaviour of AlMgSi1
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  28. Notifications/Mitteilungen
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  30. Press/Presse
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https://doi.org/10.1515/ijmr-2005-0126
Keywords for this article
Thermal barrier coating; Bond coat; Thermally grown oxide; Creep behavior; Oxidation kinetic; Delamination stress; Finite element modelling

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Heinrich Oettel – 65 Jahre
  4. Articles Basic
  5. Misorientations and geometrically necessary dislocations in deformed copper crystals: A microstructural analysis of X-ray rocking curves
  6. Microstructure and lattice defects in highly deformed metals by X-ray diffraction whole powder pattern modelling
  7. Magnetoplasticity
  8. Articles Applied
  9. Finite-element analysis of the hot-pressing consolidation of continuous Al2O3 fibers-reinforced NiAl composites
  10. Modelling the stress state of a thermal barrier coating system at high temperatures
  11. Impedance spectroscopy of thermal barrier coatings as non-destructive evaluation tool for failure detection
  12. Diffraction by image processing and its application in materials science
  13. On the preferred orientation in Ti1–xAlxN and Ti1–x–yAlxSiyN thin films
  14. Boron segregation and creep in ultra-fine grained tempered martensite ferritic steels
  15. Numeric simulation of the α/γ-phase ratio of ferritic-austenitic duplex steels
  16. Deformation behaviour and microscopic investigations of cyclically loaded railway wheels and tyres
  17. Similarity considerations on the simulation of turning processes of steels
  18. Crack-tip residual stresses and crack propagation in cyclically-loaded specimens under different loading modes
  19. On the effect of oxide scale stability on the internal nitridation process in high-temperature alloys
  20. Nitriding behaviour of the intermetallic alloy FeAl
  21. Material-related fundamentals of cutting techniques for GaAs wafer manufacturing
  22. Determination of RuAl phase boundaries in binary Ru–Al phase diagram at room temperature and 1200 °C
  23. On the Orowan stress in intermetallic ODS alloys and its superposition with grain size and solid solution hardening
  24. Effects of particle reinforcement on creep behaviour of AlSi1MgCu
  25. Effect of preaging on the precipitation behaviour of AlMgSi1
  26. Corrosion behaviour of hard coatings on Mg substrates
  27. Phase transformations in creep resistant MgYNdScMn alloy
  28. Notifications/Mitteilungen
  29. Personal/Personelles
  30. Press/Presse
  31. Conferences
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