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High Temperature Resistance of Al-Si Coating on DZ40M Superalloy

Yan Cai

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Abstract

The Al-Si coating on DZ40M superalloy was prepared by slurry process.The high temperature oxidation behaviors at 1000℃ and the hot corrosion behaviors at 900℃ were studied.The results indicate that the Al-Si coating has excellent high temperature oxidation resistance,the coating consists of CoAl phase,as the oxidation time extending,the degradation of CoAl phase take place,transform to α-Co phase gradually;both of the superalloy and coating have excellent hot corrosion resistance.

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What this paper is about

The Al-Si coating on DZ40M superalloy was prepared by slurry process.The high temperature oxidation behaviors at 1000℃ and the hot corrosion behaviors at 900℃ were studied.The results indicate that the Al-Si coating has excellent high temperature oxidation resistance,the coating consists of CoAl phase,as the oxidation time extending,the degradation of CoAl phase take place,transform to α-Co phase gradually;both of the superalloy and coating have excellent hot corrosion resistance.

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Available abstract

The Al-Si coating on DZ40M superalloy was prepared by slurry process.The high temperature oxidation behaviors at 1000℃ and the hot corrosion behaviors at 900℃ were studied.The results indicate that the Al-Si coating has excellent high temperature oxidation resistance,the coating consists of CoAl phase,as the oxidation time extending,the degradation of CoAl phase take place,transform to α-Co phase gradually;both of the superalloy and coating have excellent hot corrosion resistance.

Key concepts: Superalloy, Materials science, Coating, Slurry, Metallurgy, Corrosion, Phase (matter), Degradation (telecommunications)

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