STRUCTURE AND OXIDATION BEHAIVIOR OF GRADIENT (Ti,Al)N COATING PREPARED BY ARC ION PLATING

J Chin Soc Corr Pro

2008, Vol. 28

Issue (1): 0-6 DOI:

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STRUCTURE AND OXIDATION BEHAIVIOR OF GRADIENT (Ti,Al)N COATING PREPARED BY ARC ION PLATING

中科院金属研究所;腐蚀与防护国家重点实验室

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. STRUCTURE AND OXIDATION BEHAIVIOR OF GRADIENT (Ti,Al)N COATING PREPARED BY ARC ION PLATING. J Chin Soc Corr Pro, 2008, 28(1): 0-6 .

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Abstract Abstract Gradient (Ti,Al)N coating was deposited on 1Cr11Ni2W2MoV stainless steel for aero-engine compressor blades by arc ion plating. The XRD results showed that the gradient coating had a B1(NaCl) structure with (220) preferred orientation. The elemental gradient distributions of Ti and Al were confirmed by electron probe microanalysis (EPMA). The oxidation test of the coatings was carried out by heating the samples at temperatures of 700℃ and 800℃ respectively in the air for selected time. The surface and cross-sectional morphologies of the as-deposited and oxidized coatings were investigated by scanning electron microscopy (SEM/EDS). The oxidation results indicated that the gradient coatings were protective at 700℃ for long time and at 800℃ for short time. It was found that protective layers rich in amorphous alumina formed on top of the gradient (Ti,Al)N film during the elevated temperature oxidation which protected the film from further oxidation.

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Received: 24 February 2006

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