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Segmented Thermal Barrier Coatings for ID and OD Components Using the SinplexPro Plasma Torch

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Abstract

Thermal barrier coatings (TBCs) with high thermal strain tolerance and erosion resistance are commonly applied onto the inner and outer diameters of hot sections of gas-turbine engine components. In this work, strain-tolerant, segmented TBCs were developed using the SinplexPro-cascaded torch. Design of experiments were carried out to study the effect of process variables such as plasma power, powder feeding rate, spraying distance and surface speed on the coating microstructure and properties. Optimized process parameters for the segmented coating microstructures at shorter spray distance (<75mm) and longer spray distance (>114mm) are achieved, which are targeted for spraying inner diameter (ID) and outer diameter (OD) engine components, respectively. The plasma torch hardware life was evaluated by torch cycle duration runs. Examples of highly strain-tolerant TBCs onto the ID and OD engine components were demonstrated, highlighting the wide versatility and process range of the SinplexPro.

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Acknowledgments

The authors would like to acknowledge Manfred Stapgens, Robert Harmon and Colin Rojas for the work on coating microstructure characterization.

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Authors and Affiliations

  1. Oerlikon Metco US Inc, New York, USA

    Dianying Chen, Riston Rocchio-Heller & Christopher Dambra

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  1. Dianying Chen
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  2. Riston Rocchio-Heller
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  3. Christopher Dambra
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Correspondence to Dianying Chen.

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This article is an invited paper selected from presentations at the 2018 International Thermal Spray Conference, held May 7–10, 2018, in Orlando, Florida, USA, and has been expanded from the original presentation.

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Chen, D., Rocchio-Heller, R. & Dambra, C. Segmented Thermal Barrier Coatings for ID and OD Components Using the SinplexPro Plasma Torch. J Therm Spray Tech 28, 1664–1673 (2019). https://doi.org/10.1007/s11666-019-00920-x

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  • DOI: https://doi.org/10.1007/s11666-019-00920-x

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