FIELD: blades.
SUBSTANCE: invention relates to ceramic coatings and can be used as thermal insulation coatings on turbine blades. Two-layer outer ceramic coating consists of a lower ceramic coating and an outer ceramic coating, the lower ceramic coating having a porosity of at least 5%, almost does not have or does not have vertical cracks, in particular it does not have any through vertical cracks, while the outer ceramic coating has a maximum thickness of 40% of the thickness of the lower ceramic coating, is permeated with vertical cracks and has a maximum thickness of 500 mcm.
EFFECT: by using a two-layer ceramic heat-insulating coating with a highly porous, crack-free bottom layer and an outer layer, with vertical cracks layer of thermal insulation coating is guaranteed both high thermal insulation and high resistance to erosion.
15 cl, 6 dwg
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