РАЗРАБОТКА ЖАРОСТОЙКОГО ТЕРМОБАРЬЕРНОГО ПОКРЫТИЯ ДЛЯ ДЕТАЛЕЙ ГАЗОТУРБИННЫХ ДВИГАТЕЛЕЙ И ГАЗОТУРБИННЫХ УСТАНОВОК

Abstract

The work is devoted to the development of new compositions of a heat-resistant thermal barrier coating for parts of gas turbine engines and gas turbine plants. The main existing materials and technologies for applying heat-resistant thermal barrier coatings are presented, and promising materials for the production of heat-resistant thermal barrier coatings are presented. The proposed new composition of the heat-resistant thermal barrier coating is a four-layer composition: as the first two heat-resistant bonding layers, materials based on nickel with the addition of aluminum, chromium, yttrium, rhenium, hafnium are used; in the last two layers, materials based on zirconium dioxide with the addition of rare earth metal oxides were used. The results of comparative tests for thermal cyclic resistance, isothermal heat resistance of samples from a superalloy based on nickel with a new composition of a heat-resistant thermal barrier coating and compositions existing at JSC "UEC-Perm Motors" are presented. And also measured the thermal diffusivity by the method of laser flash of samples from a superalloy based on nickel with a new and one of the existing at JSC «UEC-Perm Motors» compositions of the heat-resistant thermal barrier coating. The use of the developed composition of a heat-resistant thermal barrier coating makes it possible to significantly increase the service life of parts of the hot part of gas turbine engines and gas turbine plants, as well as to ensure the performance of parts on new and promising products with an increased operating temperature. Today, in conditions JSC «UEC-Perm Motors», a new composition of a heat-resistant thermal barrier coating is used in the manufacture of gas turbine plants and gas turbine engines based on PS90-A.