Degradation of Si-Al aluminide coating after service of turbine blades made of ZhS6K superalloy

Aero engine turbine blades made of nickel-based superalloys are characterized by very good mechanical properties, but their hot corrosion resistance is insufficient. Therefore, various protective coatings must be applied. These coatings are typically made of diffusive aluminide coatings based on the...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2012-01, Vol.35 (1), p.12010-9
Main Authors: Chmiela, B, Kianicová, M, Sozańska, M, Swadźba, L
Format: Article
Language:English
Subjects:
Aerospace engines
Aluminides
Aluminum
Coating
Corrosion resistance
Degradation
Hot corrosion
Intermetallic compounds
Intermetallic phases
Intermetallics
Jet engines
Mechanical properties
Nickel
Nickel aluminides
Nickel base alloys
Nickel compounds
Overheating
Oxidation resistance
Protective coatings
Silicon
Superalloys
Thermal resistance
Turbine blades
Turbines
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Summary:Aero engine turbine blades made of nickel-based superalloys are characterized by very good mechanical properties, but their hot corrosion resistance is insufficient. Therefore, various protective coatings must be applied. These coatings are typically made of diffusive aluminide coatings based on the β-NiAl intermetallic phase. Although the oxidation resistance and hot corrosion resistance of these coatings are very good, their thermal resistance is relatively poor. As a result, turbine blades with aluminide coatings are prone to degradation in case of overheating. In this paper we study the degradation of the Si-Al aluminide coating on turbine blades made of ZhS6K superalloy during overheating in the DV2 jet engine.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/35/1/012010