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Air-plasma spraying of cavitation- and hydroabrasive-resistant coatings

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Thermophysics and Aeromechanics Aims and scope

Abstract

Results of a study of the air-plasma spraying of cavitation- and hydroabrasive-resistant coatings from powder materials are reported. A method of laboratory (bench) testing of coatings for resistance under pulsed impact loads is proposed. The bench is a laboratory impact tester that strikes an indenter brought in permanent contact with the sample. A measure of the damage inflicted to the surface hardened by a wear-resistant coating is the diameter of the hole produced by the indenter. The moment of coating destruction is the time at which cracks appear in the coating or the peeling occurs. The developed technique of the bench tests for the pulsed impact loading of wear-resistant coatings imitates the operating conditions of the blades of a high-speed propeller of a water-jet propulsion device in shallow water. The method of air-plasma spraying of powder materials as protective coatings was successfully tested when hardening the propeller blades of a water-jet propulsor of a KS-101D river ship.

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Correspondence to V. I. Kuzmin.

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This work was carried out within the framework of the Program of Fundamental Scientific Research of the State Academies of Sciences for the years of 2013–2020 (Project No. AAAA-A17-117030610120-2).

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Kuzmin, V.I., Gulyaev, I.P., Sergachev, D.V. et al. Air-plasma spraying of cavitation- and hydroabrasive-resistant coatings. Thermophys. Aeromech. 27, 285–294 (2020). https://doi.org/10.1134/S0869864320020109

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  • DOI: https://doi.org/10.1134/S0869864320020109

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