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6544 |
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Development of high performance thermal barrier coatings - an engineered powders approach |
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Nicholas Curry* / Treibacher Industrie AG, Austria Richard Trache / Treibacher Industrie AG, Austria Karl Körner/ Treibacher Industrie AG, Austria Johann Susnjar/ Treibacher Industrie AG, Austria Matthias Leitner/ Treibacher Industrie AG, Austria |
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Ceramic coatings have been an established part of gas turbine manufacturing for several decades. However, the demands of new generation engines require higher performance from coating systems. In parallel, environmental concerns are driving the need for more efficient coating techniques. A combined materials and process approach is needed to develop new coatings to achieve these performance goals. In this study, a design-based approach to development of new air plasma spray powders has been taken; where the powder morphology and chemistry are customized to achieve required coating performance. This powders approach has been combined with high power plasma spray equipment for manufacturing of the coatings. The performance of the thermal barrier coatings have been assessed in terms of their thermal properties, long-term ageing, furnace cyclic lifetime and adhesion. Benchmarking is made in performance versus a standard yttria stabilized zirconia coating. The deposition efficiency of the coatings is also discussed also in comparison with coatings produced by legacy plasma spray equipment. |