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Influence of dopant on the thermal properties of two plasma-sprayed zirconia coatings Part I: Relationship between powder characteristics and coating properties

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Abstract

Plasma- sprayed coatings produced with two zirconia powders (− 90 + 10 µm, spray dried and partially sintered) that were stabilized (9 wt %) with dysprosia (DSZ) and ytterbia (YbSZ) were compared to coat-ings sprayed with a yttria (7 wt %) stabilized zirconia (YSZ) powder (45 + 22 µm, fused and crushed). The YSZ particles in the coating were almost fully molten (less than 0.2 % monoclinic m- phase), with excellent contact between the layered splats (adhesion of 54 MPa). The DSZ particles were only partially melted (3.1 % m- phase), with coating adhesion greater than 34 MPa; the YbSZ particles were less melted (6.1 % m- phase), with coating adhesion of 27 MPa. The thermal properties (diffusivity, a; specific heat, cp; and thermal conductivity, κ) of the coatings were about the same. Under thermal cycling (1 h heating at 1100 °C in a furnace followed by fast cooling for approximately 3 min by air jets) of the coatings sprayed on FeCrAl alloy manufactured by powder metallurgy, the behavior of the DSZ coating was simi-lar to that of the YSZ, whereas the YbSZ coating was partially detached. However, in all cases the percent-age of the monoclinic phase decreased and the ratio of the hexagonal structure increased to 1.013 of the nontransformable tetragonal phase t′.

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References

  1. S. Stecura, “Two Layer Thermal Barrier Coating for Turbine Airfoils— Furnace and Burner Rig Test Results,” NASA Tech. Memo. X-3425, NASA-Lewis Research Center, 1976

  2. K.D. Sheffler and D.K. Gupta, Current Status and Future Trends in Turbine Applications of T.B. Coatings,J. Eng. Gas Turbines Power (Trans. ASME), Vol 110,1988, p 605–625

    Article  CAS  Google Scholar 

  3. R.V. Bratton and K.S. Lau, Zirconia Thermal Barrier Coatings,Science and Technology of Zirconia, Vol 3,Advances in Ceramics, American Ceramic Society, 1984, p 226–238

    Google Scholar 

  4. N. Claussen, M. Ruhle, and A. Hever, inScience and Technology of Zirconia, Vol 2,Advances in Ceramics, American Ceramic Society, 1984

  5. C.C. Chang, W. Phucharoen, and R.A. Miller, Behavior of Thermal Barrier Coatings for Advanced Gas Turbine Blades,Surf. Coat. Tech- nol., Vol 30,1987, p 13–28

    Article  CAS  Google Scholar 

  6. Ch. Mertems-Lecomte, D. Mack, and J. Garcia, Characterization of a New Aerospace Thermal Barrier Coating,Thermal Spray Industrial Applications, C.C. Berndt and S. Sampath, Ed., ASM International, 1994

  7. P.D. Harmsworth and R. Stevens, Phase Composition and Properties of Plasma Sprayed Zirconia Thermal Barrier Coatings,J. Mater. Sci., Vol 27,1992,p611–615

    Article  CAS  Google Scholar 

  8. P.D. Harmsworth and R. Stevens, Microstructure of Zirconia-Yttria Plasma Sprayed Thermal Barrier Coatings,J. Mater. Sci., Vol 27,1992, p 616–624

    Article  CAS  Google Scholar 

  9. J.P. Traverse and M. Foex, Zirconia Stabilization,Rev. Int. Hautes Temp. Réfract., Vol 65,1961, p 2048–2056

    Google Scholar 

  10. D. Bernard and P. Fauchais, Influence of the Torch-Substrate Relative Movements and Cooling of the Coatings during Spraying on the Mechanical Properties of TBCs,Thermal Spray Research and Applications, T.F. Bemecki, Ed., ASM International, 1991, p 551–560

  11. S. Fantassi, M. Vardelle, A. Vardelle, and P. Fauchais, Influence of the Velocity of Plasma Sprayed Particles on Splat Formation,J. Therm. Spray Technol., Vol 2 (No. 4), 1993, p 379–384

    CAS  Google Scholar 

  12. L. Bianchi, F. Blein, A. Grimaud, and P. Fauchais, Comparison of Plasma Sprayed Alumina and Zirconia Coatings by RF and DC Plasma Spraying,Thermal Spray Industrial Applications, C.C. Berndt and S. Sampath, Ed., ASM International, 1994, p 575-581

  13. E. Mariage, “Measurement of the Specific Heat of So” Ph.D. thesis, University of Limoges, Limoges, France, Dec 1990

  14. R. Brandt, L. Pawlowski, G. Neuer, and P. Fauchais, Specific Heat and Thermal Conductivity of Plasma Sprayed Yttria-Stabilized Zirconia and NiAl, NiCr, NiCrAl, NiCrAlY, NiCoCrAlY Coatings,High Temp.- High Press., Vol 19,1986, p 65–77

    Google Scholar 

  15. M. Vardelle, A. Vardelle, A. Denoirjean, and P. Fauchais, Heat Treatment of Zirconia Powders with Different Morphologies under Thermal Plasma Conditions,MRS Spring Meeting Proc, Vol 190,1991, p 175- 183

    CAS  Google Scholar 

  16. P. Diez and R.W. Smith, The Influence of Powder Agglomeration Methods on Plasma Sprayed Yttria Coatings,J. Therm. Spray Technol., Vol 2 (No.2), 1993, p 165–172

    CAS  Google Scholar 

  17. M. Vardelle, A. Vardelle, and P. Fauchais, Spray Parameters and Particle Behavior Relationships during Plasma Spraying,J. Therm. Spray Technol., Vol 2 (No. 1), 1993, p 79–92

    CAS  Google Scholar 

  18. J. Philibert, “Diffusion et transport de la matière dans les solides,” Les Editions de Physique, France, Sept 1985, p 391–410

    Google Scholar 

  19. P. Roumilhac, M. Vardelle, A. Vardelle, and P. Fauchais, Comparison of Heat and Momentum Transfer to Ceramic Particles Sprayed in Ar-H2 and Ar-He Plasma Jets at Atmospheric Pressure,Plasma Spray Technology: New Ideas and Processes, D.L. Houck, Ed., ASM International, 1989, p 111-117

  20. J.F. Coudert, M.P. Planche, O. Betoule, M. Vardelle, and P. Fauchais, Measurement of Flow Velocity and Correlation to Particle Velocity under Plasma Spraying,Thermal Spray Coatings: Research Design and Applications, C.C. Berndt and T.F. Bernecki, Ed., ASM International, 1993, p 19-24

  21. F. Gitzhofer, A. Vardelle, M. Vardelle, and P. Fauchais, Influence of the Morphology of ZrO2 Particles Stabilized with Y2O3 on Thermomechanical Properties of Plasma-Sprayed Coatings,J. Mater. Sci. Eng., Vol A147, 1991, p 107–120

    Article  CAS  Google Scholar 

  22. M. Vardelle, A. Vardelle, A.C. Leger, P. Fauchais, and D. Gobin, Influence of the Particle Parameters at Impact on Splat Formation and Solidification in Plasma Spraying Processes,J. Therm. Spray Technol., Vol 4 (No. 1), 1995, p 50–58

    CAS  Google Scholar 

  23. P. Fauchais, M. Vardelle, A. Vardelle, L. Bianchi, and A.C. Leger, Parameters Controlling the Generation and Properties of Plasma Sprayed Zirconia Coatings,Plasma Chem. Plasma Process., Vol 16 (No. 1), 1996,p 99S-125S

    Article  CAS  Google Scholar 

  24. L. Bianchi, P. Lucchese, A. Denoirjean, and P. Fauchais, Microstructural Investigation of Plasma-Sprayed Alumina Splats,Advances in Thermal Spray Science and Technology, C.C. Berndt and S. Sam- path, Ed., ASM International, 1995, p 255-260

  25. A. Haddadi, F. Nardou, A. Grimaud, and P. Fauchais, Generation of the First Layers of Zirconia Plasma Sprayed Coatings: Correlation between Splat Layering and Spraying Parameters,Advances in Thermal Spray Science and Technology, C.C. Berndt and S. Sampath, Ed., ASM International, 1995, p 249-254

  26. R.A. Miller, W.J. Brindley, J.G. Goedjen, R. Tiwarni, and D. Mess,The Effect of Silica on the Cyclic Life of a Zirconia-Yttria Thermal Barrier Coating,Thermal Spray Industrial Applications, C.C. Bemdt and S. Sampath, Ed., ASM International, 1994, p 49-55

  27. G. Gasgnier, “Yttria Densification,” Ph.D. thesis, University of Limoges, Limoges, France, 1991

    Google Scholar 

  28. R. Harnacha, “Contribution to the Study of Plasma Sprayed Coatings: Influence of Thermal Post Treatments and Nature of the Zirconia Stabilizer,” Ph.D. thesis, University of Limoges, Limoges, France, March 1994

    Google Scholar 

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Authors and Affiliations

  1. LMCTS-URACNRS 320, 123 Avenue Albert Thomas, 87060, Limoges, Cedex, France

    R. Harnacha, P. Fauchais & F. Nardou

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  1. R. Harnacha
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  2. P. Fauchais
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  3. F. Nardou
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Harnacha, R., Fauchais, P. & Nardou, F. Influence of dopant on the thermal properties of two plasma-sprayed zirconia coatings Part I: Relationship between powder characteristics and coating properties. JTST 5, 431–438 (1996). https://doi.org/10.1007/BF02645273

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