Advertisement

Modelling and analysis of the oxide growth coupling behaviour of thermal barrier coatings

  • Xiaokang Wang
  • Xueling FanEmail author
  • Yongle Sun
  • Rong Xu
  • Peng Jiang
Computation and theory
  • 30 Downloads

Abstract

A chemo-transport-mechanics model is developed to study the growth of thermally grown oxide (TGO) and its impact on deformation and stress in air plasma-sprayed thermal barrier coatings (TBCs). As the driving force for oxygen transport, the chemical potential consists of contributions from both species concentration and hydrostatic pressure. The model suggests that both the concentration boundary condition and the transport process of the oxygen are affected by hydrostatic stress. Since oxygen has smaller diffusion coefficient in TGO than in BC, the retarding effect of the formed TGO on oxygen transport is considered and clarified by the coupled model. The competition between geometrical imperfection (i.e. concave morphology) and the chemo-mechanics coupling to influence the transport of oxygen is also identified numerically. The geometrical imperfection can introduce additional oxygen transport at the margin of the concave imperfection due to the horizontal component of the gradient of the chemical potential of the oxygen, which plays a dominant role in the TGO growth kinetics for the studied TBCs. Consequently, there is a limited effect of the chemo-mechanics coupling on the growth kinetics of a concaved TGO. The amplitude change of the concave portion is found to be up to 0.36 µm after 600-h exposure at 1150 °C, which leads to large tensile stress above the concave portion potentially causing micro-cracks.

List of symbols

σ

Hydrostatic stress

σij

Stress component

εij

Strain component

Kijkl

Stiffness matrix

εije

Elastic strain

εijp

Plastic strain

εijT

Thermal strain

εijg

Growth strain

εijc

Chemical strain

ui

Displacement

α

Coefficient of thermal expansion (CTE)

T

Temperature

T0

Reference temperature

RPB

Pilling–Bedworth ratio

ξ

Oxide volume percentage

c

Oxygen concentration

Ω

Partial molar volume

μ

Chemical potential

μ0

Reference chemical potential

R

Gas constant

J

Diffusion flux

D

Diffusion coefficient

D0

Reference diffusion coefficient

H(ξ)

Step function

v

Chemical reaction rate

K

Chemical reaction constant

rD

Ratio of diffusion coefficient of oxygen in TGO to that in BC

Notes

Acknowledgements

This work is supported by NSFC (11472204 and 1171101165) and the Fundamental Research Funds for the Central Universities.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

References

  1. 1.
    Padture NP, Gell M, Jordan EH (2002) Thermal barrier coatings for gas-turbine engine applications. Science 296:280–284CrossRefGoogle Scholar
  2. 2.
    Evans AG, Mumm DR, Hutchinson JW et al (2001) Mechanisms controlling the durability of thermal barrier coatings. Prog Mater Sci 5:505–553CrossRefGoogle Scholar
  3. 3.
    Clarke DR, Oechsner M, Padture NP (2012) Thermal-barrier coatings for more efficient gas-turbine engines. MRS Bull 37:891–898CrossRefGoogle Scholar
  4. 4.
    Xu R, Fan XL, Zhang WX et al (2013) Effects of geometrical and material parameters of top and bond coats on the interfacial fracture in thermal barrier coating system. Mater Des Complete 47:566–574.  https://doi.org/10.1016/j.matdes.2012.12.053 Google Scholar
  5. 5.
    Xu R, Fan X, Wang TJ (2016) Mechanisms governing the interfacial delamination of thermal barrier coating system with double ceramic layers. Appl Surf Sci C 370:394–402CrossRefGoogle Scholar
  6. 6.
    Jiang P, Fan X, Sun Y et al (2018) Bending-driven failure mechanism and modelling of double-ceramic-layer thermal barrier coating system. Int J Solids Struct 130–131:11–20CrossRefGoogle Scholar
  7. 7.
    Sun Y, Li J, Zhang W, Wang TJ (2013) Local stress evolution in thermal barrier coating system during isothermal growth of irregular oxide layer. Surf Coat Technol 216:237–250CrossRefGoogle Scholar
  8. 8.
    Sun Y, Zhang W, Li J, Wang TJ (2013) Local stress around cap-like portions of anisotropically and nonuniformly grown oxide layer in thermal barrier coating system. J Mater Sci 48:5962–5982.  https://doi.org/10.1007/s10853-013-7393-7 CrossRefGoogle Scholar
  9. 9.
    Fan XL, Qin WJ (2011) Stress distribution in the vicinity of thermally grown oxide of thermal barrier coatings. Adv Mater Res 160–162:721–725Google Scholar
  10. 10.
    Fan XL, Zhang WX, Wang TJ, Sun Q (2012) The effect of thermally grown oxide on multiple surface cracking in air plasma sprayed thermal barrier coating system. Surf Coat Technol 208:7–13CrossRefGoogle Scholar
  11. 11.
    Su L, Zhang W, Sun Y, Wang TJ (2014) Effect of TGO creep on top-coat cracking induced by cyclic displacement instability in a thermal barrier coating system. Surf Coat Technol C 254:410–417CrossRefGoogle Scholar
  12. 12.
    Xu R, Fan XL, Zhang WX, Wang TJ (2014) Interfacial fracture mechanism associated with mixed oxides growth in thermal barrier coating system. Surf Coat Technol 253:139–147CrossRefGoogle Scholar
  13. 13.
    Li B, Fan X, Zhou K, Wang TJ (2017) Effect of oxide growth on the stress development in double-ceramic-layer thermal barrier coatings. Ceram Int 43:14763–14774CrossRefGoogle Scholar
  14. 14.
    Lv J, Fan X, Li Q (2017) The impact of the growth of thermally grown oxide layer on the propagation of surface cracks within thermal barrier coatings. Surf Coat Technol 309:1033–1044CrossRefGoogle Scholar
  15. 15.
    Evans HE (2011) Oxidation failure of TBC systems: an assessment of mechanisms. Surf Coat Technol 206:1512–1521CrossRefGoogle Scholar
  16. 16.
    Busso EP, Wright L, Evans HE et al (2007) A physics-based life prediction methodology for thermal barrier coating systems. Acta Mater 55:1491–1503CrossRefGoogle Scholar
  17. 17.
    Rabiei A, Evans AG (2000) Failure mechanisms associated with the thermally grown oxide in plasma-sprayed thermal barrier coatings. Acta Mater 48:3963–3976CrossRefGoogle Scholar
  18. 18.
    Evans AG, He MY, Hutchinson JW (2001) Mechanics-based scaling laws for the durability of thermal barrier coatings. Prog Mater Sci 46:249–271CrossRefGoogle Scholar
  19. 19.
    Fan XL, Xu R, Zhang WX, Wang TJ (2012) Effect of periodic surface cracks on the interfacial fracture of thermal barrier coating system. Appl Surf Sci 258:9816–9823CrossRefGoogle Scholar
  20. 20.
    Busso EP, Qian ZQ, Taylor MP, Evans HE (2009) The influence of bondcoat and topcoat mechanical properties on stress development in thermal barrier coating systems. Acta Mater 57:2349–2361CrossRefGoogle Scholar
  21. 21.
    Busso EP, Evans HE, Qian ZQ, Taylor MP (2010) Effects of breakaway oxidation on local stresses in thermal barrier coatings. Acta Mater 58:1242–1251CrossRefGoogle Scholar
  22. 22.
    He MY, Hutchinson JW, Evans AG (2002) Large deformation simulations of cyclic displacement instabilities in thermal barrier systems. Acta Mater 50:1063–1073CrossRefGoogle Scholar
  23. 23.
    Karlsson AM, Hutchinson JW, Evans AG (2002) A fundamental model of cyclic instabilities in thermal barrier systems. J Mech Phys Solids 50:1565–1589CrossRefGoogle Scholar
  24. 24.
    Karlsson AM, Xu T, Evans AG (2002) The effect of the thermal barrier coating on the displacement instability in thermal barrier systems. Acta Mater 50:1211–1218CrossRefGoogle Scholar
  25. 25.
    Kang K-J, Hutchinson JW, Evans AG (2003) Measurement of the strains induced upon thermal oxidation of an alumina-forming alloy. Acta Mater 51:1283–1291CrossRefGoogle Scholar
  26. 26.
    He MY, Hutchinson JW, Evans AG (2003) Simulation of stresses and delamination in a plasma-sprayed thermal barrier system upon thermal cycling. Mater Sci Eng A 345:172–178CrossRefGoogle Scholar
  27. 27.
    Karlsson AM, Hutchinson JW, Evans AG (2003) The displacement of the thermally grown oxide in thermal barrier systems upon temperature cycling. Mater Sci Eng A 351:244–257CrossRefGoogle Scholar
  28. 28.
    Xu T, He MY, Evans AG (2003) A numerical assessment of the durability of thermal barrier systems that fail by ratcheting of the thermally grown oxide. Acta Mater 51:3807–3820CrossRefGoogle Scholar
  29. 29.
    Zhou H (2010) Stress-diffusion interaction during oxide scale growth on metallic alloys. Ph.D. Dissertation. Georgia Institute of TechnologyGoogle Scholar
  30. 30.
    Loeffel K, Anand L (2011) A chemo-thermo-mechanically coupled theory for elastic–viscoplastic deformation, diffusion, and volumetric swelling due to a chemical reaction. Int J Plast 27:1409–1431CrossRefGoogle Scholar
  31. 31.
    Loeffel K, Anand L, Gasem ZM (2013) On modeling the oxidation of high-temperature alloys. Acta Mater 61:399–424CrossRefGoogle Scholar
  32. 32.
    Chen L, Yueming L (2018) A coupled mechanical-chemical model for reflecting the influence of stress on oxidation reactions in thermal barrier coating. J Appl Phys 123:215305CrossRefGoogle Scholar
  33. 33.
    Suo Y, Shen S (2015) Coupling diffusion–reaction–mechanics model for oxidation. Acta Mech 226:3375–3386CrossRefGoogle Scholar
  34. 34.
    Wang T, Fan XL et al (2016) The stresses and cracks in thermal barrier coating system: a review. Chin J Solid Mech 37(6):477–517Google Scholar
  35. 35.
    Mura T (1987) Micromechanics of defects in solids, 2nd edn. Springer, DordrechtCrossRefGoogle Scholar
  36. 36.
    Panicaud B, Grosseau-Poussard JL, Dinhut JF (2008) General approach on the growth strain versus viscoplastic relaxation during oxidation of metals. Comput Mater Sci 42:286–294CrossRefGoogle Scholar
  37. 37.
    Suo Y, Shen S (2013) General approach on chemistry and stress coupling effects during oxidation. J Appl Phys 114:164905CrossRefGoogle Scholar
  38. 38.
    Suo Y, Yang X, Shen S (2015) Residual stress analysis due to chemomechanical coupled effect, intrinsic strain and creep deformation during oxidation. Oxid Met 84:413–427CrossRefGoogle Scholar
  39. 39.
    Panicaud B, Grosseau-Poussard JL, Dinhut JF (2006) On the growth strain origin and stress evolution prediction during oxidation of metals. Appl Surf Sci 252:5700–5713CrossRefGoogle Scholar
  40. 40.
    Maharjan S, Zhang XC, Xuan FZ et al (2011) Residual stresses within oxide layers due to lateral growth strain and creep strain: analytical modeling. J Appl Phys 110:063511CrossRefGoogle Scholar
  41. 41.
    Tolpygo VK, Dryden JR, Clarke DR (1998) Determination of the growth stress and strain in α-Al2O3 scales during the oxidation of Fe–22Cr–4.8Al–0.3Y alloy. Acta Mater 46:927–937CrossRefGoogle Scholar
  42. 42.
    Ruan JL, Pei Y, Fang D (2012) Residual stress analysis in the oxide scale/metal substrate system due to oxidation growth strain and creep deformation. Acta Mech 223:2597–2607CrossRefGoogle Scholar
  43. 43.
    Ruan JL, Pei Y, Fang D (2013) On the elastic and creep stress analysis modeling in the oxide scale/metal substrate system due to oxidation growth strain. Corros Sci 66:315–323CrossRefGoogle Scholar
  44. 44.
    Hsueh CH, Evans AG (1983) Oxidation induced stresses and some effects on the behavior of oxide films. J Appl Phys 54:6672–6686.  https://doi.org/10.1063/1.331854 CrossRefGoogle Scholar
  45. 45.
    Pilling N, Bedworth RJ (1923) The oxidation of metals at high temperatures. J Inst Met 29:529–582Google Scholar
  46. 46.
    Li JCM (1981) Chemical potential for diffusion in a stressed solid. Scr Metall 15:21–28CrossRefGoogle Scholar
  47. 47.
    Reynolds O (1903) Papers on mechanical and physical subjects, vol 3. Cambridge University Press, CambridgeGoogle Scholar
  48. 48.
    Devereux OF (1983) Topics in metallurgical thermodynamics: solutions manual. Wiley-Interscience, New YorkGoogle Scholar
  49. 49.
    Shillington EAG, Clarke DR (1999) Spalling failure of a thermal barrier coating associated with aluminum depletion in the bond-coat. Acta Mater 47(4):1297–1305CrossRefGoogle Scholar
  50. 50.
    Wang L, Yang JS, Ni JX et al (2016) Influence of cracks in APS-TBCs on stress around TGO during thermal cycling: a numerical simulation study. Surf Coat Technol 285:98–112CrossRefGoogle Scholar
  51. 51.
    Quested PN, Brooks RF, Chapman L et al (2009) Measurement and estimation of thermophysical properties of Nickel based superalloys. Mater Sci Technol 25:154–162CrossRefGoogle Scholar
  52. 52.
    Jiang W, Zhang Y-C, Zhang WY et al (2016) Growth and residual stresses in the bonded compliant seal of planar solid oxide fuel cell: Thickness design of window frame. Mater Des C 93:53–62Google Scholar
  53. 53.
    Cheng J, Jordan EH, Barber B, Gell M (1998) Thermal/residual stress in an electron beam physical vapor deposited thermal barrier coating system. Acta Mater 46:5839–5850CrossRefGoogle Scholar
  54. 54.
    Martena M, Botto D, Fino P et al (2006) Modelling of TBC system failure: stress distribution as a function of TGO thickness and thermal expansion mismatch. Eng Fail Anal 13:409–426CrossRefGoogle Scholar
  55. 55.
    Richards BT, Young KA, de Francqueville F et al (2016) Response of ytterbium disilicate–silicon environmental barrier coatings to thermal cycling in water vapor. Acta Mater 106:1–14CrossRefGoogle Scholar
  56. 56.
    Knipe K, Manero Ii A, Siddiqui SF et al (2014) Strain response of thermal barrier coatings captured under extreme engine environments through synchrotron X-ray diffraction. Nat Commun 5:4559CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace EngineeringXi’an Jiaotong UniversityXi’anChina
  2. 2.School of Mechanical, Aerospace and Civil EngineeringThe University of ManchesterManchesterUK

Personalised recommendations