Journal of Thermal Spray Technology

, Volume 16, Issue 4, pp 498–505 | Cite as

Low Thermal Conductivity Coatings for Gas Turbine Applications

Peer Reviewed
First Online:
Received:
Revised:
Accepted:

Abstract

Plasma spraying of thermal barrier coatings (TBCs) on gas turbine parts is widely used today either to enable higher-turbine inlet temperatures with consequent improvement of combustion efficiency or to reduce the requirements for the cooling system and increase component life-time. Development of low conductivity TBCs, which allows us to further increase gas turbine efficiency and availability, is an ongoing challenge. In order to get low thermal conductivity values an experimental program was conducted. Yttria partially stabilized zirconia (YPSZ) and dysprosia partially stabilized zirconia (DyPSZ) were used to study the influence of power input in the plasma torch and powder feed rate on coating properties. Microstructure evaluations were performed to evaluate the influence of the spraying parameters on the coating morphology and porosity level. Laser Flash (LF) and Transient Plane Source (TPS) methods were utilized to evaluate the coatings thermal conductivity and a comparison between the two methods conducted as well as a correlation study between coating microstructure/composition and thermal conductivity (TC).

Keywords

plasma spray TBCs porosity thermal conductivity zirconia 
This is a preview of subscription content, log in to check access.

References

  1. 1.
    R.A. Miller, Thermal Barrier Coatings for Aircraft Engines: History and directions, J. Therm. Spray Technol., 1997, 6(1), p 35–42CrossRefGoogle Scholar
  2. 2.
    S.M. Meier, D.K. Gupta, The Evolution of Thermal Barrier Coatings in Gas Turbine Applications, J. Eng. Gas Turbine Power, 1994, 116(1), p 250–257Google Scholar
  3. 3.
    K.S. Ravichandran, K. An, R.E. Dutton, S.L. Semiatin, Thermal Conductivity of Plasma-Sprayed Monolithic and Multilayer Coatings of Alumina and Yttria-Stabilised Zirconia, J. Am. Ceram. Soc., 1999, 82(3), p 673–682CrossRefGoogle Scholar
  4. 4.
    X.Q. Cao, R. Vassen, D. Stoever, Ceramic Materials for Thermal Barrier Coatings, J. Eur. Ceram. Soc., 2004, 24(1), p 1–10CrossRefGoogle Scholar
  5. 5.
    C.C. Berndt, Thermal and Mechanical Properties of Thermal Barrier Coatings, Inter. J. Turbo and Jet Engines, 1991, 8(1&2), p 75–82Google Scholar
  6. 6.
    “Guide to Engineered Materials,” Adv. Mater. Processes, 158(6), p 159Google Scholar
  7. 7.
    J. Moon, H. Choi, H. Kim, C. Lee, The Effects of the Heat Treatment on the Phase Transformation Behaviour of Plasma-Sprayed Stabilized ZrO2 Coatings, Surf. Coat. Technol., 2002, 155(1), p 1–10CrossRefGoogle Scholar
  8. 8.
    M. Tamura, M. Takahashi, J. Ishii, K. Suzuki, M. Sato, K. Shimomura, Multilayered Thermal Barrier Coating for Land-Based Gas Turbines, J. Therm. Spray. Technol., 1999, 8(1), p 68–72CrossRefGoogle Scholar
  9. 9.
    J. Wigren, High Insulation Thermal Barrier Systems – HITS, Brite Euram Project BE96-3226, 1996Google Scholar
  10. 10.
    D. Zhu, and R.A. Miller, Thermal Conductivity and Sintering Behaviour of Advanced Thermal Barrier Coatings, NASA/TM-2002-211481, Cleveland, OH, March 2002Google Scholar
  11. 11.
    S. Sodeoka, M. Suzuki, T. Inoue, K. Ueno, S. Oki, Thermal and Mechanical Properties of ZrO2-CeO2 Plasma-Sprayed Coatings, J. Therm. Spray. Technol., 1997, 6(3), p 361–367CrossRefGoogle Scholar
  12. 12.
    A. Kulkarni, A. Vaidya, A. Goland, S. Sampath, H. Herman, Processing Effects on Porosity-Property Correlations in Plasma Sprayed Yttria Stabilised Zirconia Coatings, Mater. Sci. Eng. A, 2003, 359(1/2), p 100–111Google Scholar
  13. 13.
    L. Pawlowski, P. Fauchais, Thermal Transport Properties of Thermally Sprayed Coatings, Int. Mat. Rev., 1992, 37(6), p 271–289Google Scholar
  14. 14.
    O. Lavigne, Y. Renollet, M. Poulain, C. Rio, P. Moretto, P. Brannvall, and J. Wigren, Microstructural Characterization of Plasma Sprayed Thermal Barrier Coatings by Quantitative Image Analysis, Quantitative Microscopy of High Temperature Materials Conference, Sheffield, UK, 1999Google Scholar
  15. 15.
    W.J. Parker, R.J. Jenkins, C.P. Butler, G.L. Abort, Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity, J. Appl. Phys.,1961, 32, p 1679–1684CrossRefGoogle Scholar
  16. 16.
    R. Taylor, Construction of Apparatus for Heat Pulse Thermal Diffusivity Measurements from 300–3000 K, J. Phys. E: Sci. Instrum., 1980, 13, p 1193–1199 CrossRefGoogle Scholar
  17. 17.
    L. M. Clark, R.E. Taylor, Radiation loss in the flash method for thermal diffusivity, J. Appl. Phys., 1975, 46(2), p 714–719 CrossRefGoogle Scholar
  18. 18.
    D. Cowan, Pulse method of measuring thermal diffusivity at high temperatures, J. Appl. Phys., 1963, 34(4), p 926–927CrossRefGoogle Scholar
  19. 19.
    R. Brandt, L. Pawlowski, G. Neuer, Specific Heat and Thermal Conductivity of Plasma Sprayed Yttria-stabilised Zirconia and NiAl, NiCr, NiCrAl, NiCrAlY, NiCoCrAlY Coatings, High Temp.-High Pressures, 1986, 18, p 65–77Google Scholar
  20. 20.
    K.E. Wilkes and J.F. Lagedrost, Thermophysical properties of plasma sprayed coatings, NASA Report NASA-CR-121144, 1973Google Scholar
  21. 21.
    J. Wigren, Improved Plasma Sprayed Thermal Barriers for Relevant Combustor Geometries Using Enhanced Process Control and Better Test Technologies-COMBCOAT, Brite Euram Project BRE-CT94-0936, 1994Google Scholar
  22. 22.
    S. Gustafsson, Transient Plane Source Techniques for Thermal Conductivity and Thermal Diffusivity Measurement of Solid Materials, Rev. Sci. Instrum., 1991, 62(3), p 797–804CrossRefGoogle Scholar
  23. 23.
    T. Log, S.E. Gustafsson, Transient Plane Source (TPS) Technique for Measuring Thermal Transport Properties of Building Materials. Fire Mater., 1995, 19(1), p 43–49CrossRefGoogle Scholar
  24. 24.
    R.E. Taylor, X. Wang, X. Xu, Thermophysical Properties of Thermal Barrier Coatings, Surf. Coat. Technol.,1999, 120-121, p 89–95CrossRefGoogle Scholar
  25. 25.
    D. Schwingel, R. Taylor, T. Haubold, J. Wigren, C. Gualco, Mechanical and Thermophysical Properties of Thick PYSZ Thermal Barrier Coatings: Correlation with Microstructure and Spraying Parameters, Surf. Coat. Technol, 1998, 108-109, p 99–106CrossRefGoogle Scholar
  26. 26.
    S. Ahmaniemi, P. Vuoristo, T. Mäntylä, F. Cernuschi, L. Lorenzoni, Modified Thick Thermal Barrier Coatings: Thermophysical Characterization, J. Eur. Ceram. Soc., 2004, 24, p 2669–2679CrossRefGoogle Scholar

Copyright information

© ASM International 2007

Authors and Affiliations

  • N. Markocsan
    • 1
  • P. Nylén
    • 1
  • J. Wigren
    • 2
  • X. -H. Li
    • 3
  1. 1.Department of Technology, Mathematics and Computer ScienceUniversity WestTrollhättanSweden
  2. 2.Surface TechnologyVolvo Aero CorporationTrollhättanSweden
  3. 3.Department of GRDMSiemens Industrial TurbomachineryFinspångSweden

Personalised recommendations