Abstract
The main functions of multilayer thermal coatings (TC) are determined, and the separation of these functions between the various layers is established. The influence of the TC structure on the creep resistance of alloy EI868 at constant temperature and during thermal cycling was investigated. It was established that the creation of a heat resistant layer in the form of a multilayered component increases the creep resistance in both types of thermal loading. An increase in the thickness of the ceramic layer changes the failure mechanism of the heat resistant NiCrAlY layer and the total composite overall. The mechanism of crack formation in the ceramic layer of the TC was studied, and a quantitative description of this in the form of an exponential dependency is presented. An association between the indicated parameters and the endurance of the composites studied is noted.
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