Development of combined heat-resistant coatings for parts made of natural-composite material based on niobium

Kashin D.S., Stekhov P.A.
UDC
629.7.023.224
DOI
10.18577/2307-6046-2017-0-6-4-4
Article PDF (Russian) (815.14 KB)
How to cite
Kashin D.S., Stekhov P.A. Development of combined heat-resistant coatings for parts made of natural-composite material based on niobium // Proceedings of VIAM. 2017. No. 6. DOI: 10.18577/2307-6046-2017-0-6-4-4. URL: https://test.viam.ru/en/journal/2017/6/4
Keywords
heat resistant coatings, ion-plasma coatings, high-temperature gas corrosion, niobium based heat-proof alloy, barrier layer, siliconizing.
Abstract

Researches of isothermal heat resistance of samples from natural-composite material are based on niobium for GTE parts with heat-resistant coatings at a temperature of 1350°C on the basis of tests of 30 hours. Tests on the cyclic heat resistance of samples with a combined coating at a temperature of 500⇄1300°C with air cooling up to 500°C have been carried out. Investigations of the microstructures of the coatings in their original form and after tests on the heat resistance of samples from a naturally-composite material based on niobium with complex coatings were carried out. The coating of the Si+(Fe–Cr–Al–Y)+Si system has a higher crack resistance than the diffusion heat-resistant coating. Combined heat-resistant coating provides protection of parts from natural-composite material based on niobium at operating temperatures up to 1350°C, and preserves protective properties under thermal cycling conditions.

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