Features Cavitation Resistance of Multifunctional Coatings from Materials with a Shape Memory Effect
It is established on the basis of the analysis of structural components of criterion of cavitation resistance of multifunctional coatings from materials with a shape memory effect (SME) that the major factors influencing the cavitation resistant coatings are: tendency to strain hardening, reversible deformation, the adhesion strength, microhardness, uniformity of structure and roughness of a surface. Weights coefficients for assessment of influence of each of the specified components are defined. The paper studies the mechanism of enhancing cavitation resistance of coatings from materials with SME based on structural and phase transformations in the coating material, subject to local cavitation effects. Formation of surface compositions was carried out by the high-velocity oxy-fuel spraying in a protective environment. Tests on cavitation resistance of multilayer coatings of materials with SME performed according to standard methods of analysis of structural-phase state and functional-mechanical properties that they are allowed to recommend as a cavitation-resistant. Architecture layered surface composition is proposed, which provides increase of durability of products in the conditions of cavitation-abrasive environment.
KeywordsCavitation Surface Multicomponent material Multifunctional coatings SME
The work was supported by the Russian Science Foundation (Agreement No. 15-19-00202).
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