Microstructure and Mechanical Properties of Atmospheric Plasma Sprayed 8YSZ Thermal Barrier Coatings

  • N. R. KadamEmail author
  • G. Karthikeyan
  • D. M. Kulkarni
Conference paper
Part of the Lecture Notes on Multidisciplinary Industrial Engineering book series (LNMUINEN)


Thermal Barrier Coatings (TBCs) are favorable to provide better thermal insulation to hot components of gas turbine and aero engines leading to improve durability. The TBCs were prepared using a NiCoCrAlY as a bond coat and 8YSZ as a top coat with the thickness range of 100 ± 25 μm and 250 ± 25 µm respectively, by atmospheric plasma spray. This paper presents the study of surface microstructure and mechanical properties of 8YSZ TBC. The surface microstructure was examined by scanning electron microscopy and microhardness was by the microindentation test. Also, the surface roughness and elemental composition present in the coating was studied with surface profilometer and energy dispersive x-ray spectrometry. At the high-temperature conditions, PYSZ has a good combination of thermal, physical, and mechanical properties. Therefore, it is favorable to select the partially stabilized zirconia coatings as TBCs for improvement in the thermal insulation and protection from high inlet gas temperature.


Thermal barrier coatings Atmospheric plasma spray Microstructure Mechanical property Yttria stabilized zirconia 


  1. 1.
    Cao, X.Q., Vassen, R., Stoever, D.: Ceramic materials for thermal barrier coatings. J. Eur. Ceram. Soc. 24(1), 1–10 (2004)CrossRefGoogle Scholar
  2. 2.
    Vaβen, R., Jarligo, M.O., Steinke, T., Mack, D.E., Stover, D.: Overview on advanced thermal barrier coatings. Surf. Coatings Technol. 205(4), 938–942 (2010)CrossRefGoogle Scholar
  3. 3.
    Hille, T.S., Nijdam, T.J., Suiker, A.S.J., Turteltaub, S., Sloof, W.G.: Damage growth triggered by interface irregularities in thermal barrier coatings. Acta Mater. 57(9), 2624–2630 (2009)CrossRefGoogle Scholar
  4. 4.
    Miller, R.A.: Thermal barrier coatings for aircraft engines: History and directions. J. Therm. Spray Technol. 6(1), 35–42 (1997)CrossRefGoogle Scholar
  5. 5.
    Zhang, D., Zhao, Z., Wang, B., Li, S., Zhang, J.: Investigation of a new type of composite ceramics for thermal barrier coatings. Mater. Des. 112, 27–33 (2016)CrossRefGoogle Scholar
  6. 6.
    Karlsson, A.M.: Modeling failures of thermal barrier coatings. Key Eng. Mater. 333, 155–166 (2007)CrossRefGoogle Scholar

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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringBITS Pilani, K. K. Birla Goa CampusZuarinagarIndia

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