PHYSICAL AND MECHANICAL PROPERTIES OF CERAMIC MATERIALS AND COATINGS OBTAINED BY PLASMA SPRAYING

Abstract. Purpose. The purpose of the research was the development of powders of ceramic materials based on Аl2О3·Сr2О3 with the determination of their physical and mechanical properties, as well as the properties of coatings from these powders obtained by plasma spraying. Method. Physical and mechanical properties of powders were determined according to well-known methods: partical shape and dimensions, distribution by size, density, bending strength, elasticity modulus, and coefficient of linear thermal expansion. Results. Based on the conducted researches a high-temperature protective material of type Аl2О3 ·Сr2О3 and CAS has been received, samples of coatings from these materials are made. Scientific novelty.New thermo-protective composite materials for the coating of combustion chambers of gas turbine engines have been developed and their physical and mechanical properties have been determined. The practical significance. The new thermo-protective composite materials have been developed for the formation of cortical parts by plasma spraying in the manufacture of flame tubes of GTE, the parts undergo industrial tests in the conditions of OJSC “Motor Sich”.