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Thermal spray manufacturing issues in coating IGT hot section components

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Abstract

The desire to improve the performance of gas turbine engines has led to higher operating temperatures in the turbine sections of the engine. Materials used for hot section turbine blades and vanes are not resistant to hot corrosion, and therefore require protective coatings. This paper reviews the current art and technology of thermally sprayed MCrAlY and TB coatings onto hot section components. The issues in applying such coatings will be discussed, along with references to manufacturing issues on the shop floor. The difficulties inherent in applying a line-of-sight coating to complex geometries will be discussed. The testing, evaluation, and performance characteristics of typical coatings are discussed.

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References

  1. V. Srinivasan, High-Temperature Corrosion and Erosion in Gas Turbine Engines: Where Do We Stand?, JOM, Dec 1994, p 34

  2. A.J. Scalzo, R.L. Bannister, M. DeLorso, and G.S. Howard, Edition of Westinghouse Heavy-Duty Power Generator and Industrial Combustion Turbines, Trans. ASME, Vol 118, April 1996, p 316–330

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Author information

Authors and Affiliations

  1. TAFA, Inc., USA

    P. Sahoo

  2. Westinghouse Electric Corporation, USA

    T. Carr

  3. Sermatech Technical Services, USA

    R. Martin & F. Dinh

Authors
  1. P. Sahoo
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  2. T. Carr
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  3. R. Martin
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  4. F. Dinh
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Additional information

Adapted from P. Sahoo et al., “Thermal Spray Manufacturing Issues in Coating IGT Hot Section Components,” Paper No. 97-GT-487, American Society of Mechanical Engineers, 1997.

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Sahoo, P., Carr, T., Martin, R. et al. Thermal spray manufacturing issues in coating IGT hot section components. J Therm Spray Tech 7, 481–483 (1998). https://doi.org/10.1361/105996398770350684

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  • DOI: https://doi.org/10.1361/105996398770350684

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