The corporation noted that the blades are made of metal heat-resistant alloys with the addition of tungsten, molybdenum, cobalt, chromium, rare metals - ruthenium, rhenium, and others. The number of such elements can reach 15.
To reduce heat penetration into the blade body and prevent gas corrosion, wear-resistant and thermal barrier coatings, including ceramic ones, are used.
Also, the turbine implemented a system of convective-film cooling. Air of a lower temperature, which is supplied to the turbine blades from the compressor, acts as a coolant in this case.
The temperature of this air is lower than the temperature of the gas flow acting on the turbine blades. Therefore, the air creates a barrier film on the surface of the blades, which protects the blades from the hot gas flow.
Earlierwww1.ru reported thatRostec was instructed to reduce the cost of MS-21 and SJ-100, advantages over Boeing and Airbus are needed.
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