Analysis of the Coefficient of Linear Thermal Expansion of Sealing Coatings of Gas Turbine Engine Parts

Keywords

sealing coatings, temperature coefficient of linear expansion, dilatogram, yttrium-containing ligature, coefficient of efficiency

Abstract

The work investigates the effect of yttrium on the temperature coefficient of linear expansion of KNA-82 coatings for the hot path of gas turbine engines (GTE). The coating with a yttrium content of 0.3%, applied by plasma spraying, has the most stable adhesion to the substrate material under cyclic temperature changes. The results can be used to improve the efficiency and durability of the GTE.

References

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