INFLUENCE OF THE ROOM-TEMPERATURE CORROSION ONTHE CYCLIC OXIDATION BEHAVIOR OF Al-Si COATINGS

J Chin Soc Corr Pro

2003, Vol. 23

Issue (3): 183-186 DOI:

Research Report

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INFLUENCE OF THE ROOM-TEMPERATURE CORROSION ONTHE CYCLIC OXIDATION BEHAVIOR OF Al-Si COATINGS

Fubin Song;Qi Zhang

北京航空航天大学材料科学与工程学院

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Fubin Song; Qi Zhang. INFLUENCE OF THE ROOM-TEMPERATURE CORROSION ONTHE CYCLIC OXIDATION BEHAVIOR OF Al-Si COATINGS. J Chin Soc Corr Pro, 2003, 23(3): 183-186 .

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Abstract The cyclic oxidation behavior of Al-Si coatings on the Ni-base superalloy DZ125 has been investigated,which has been corroded by ro om temperature corrosion.The results indicated that the room temperature corrosi on decreased the Al content,and increased the surface roughness of the coating.D uring the subsequent cyclic oxidation,the phase transformation of βNiAl t oγ′Ni3Al and the spallation of Al2O3 scale are accelerated.As a re sult,the oxidation resistance and lifetime of the coating are decreased.

Key words: Al-Si coatings room-temperature corrosion cyclic oxi dation

Received: 20 November 2001

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