Acta Metall Sin  2005, Vol. 41 Issue (11): 1167-1173     DOI:

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Microstructure and initial stage oxidation of NiCoCrAlY coatings deposited by arc ion plating technique

SUN Chao; WANG Qimin; TANG Yongji; GUAN Qingfeng; GONG Jun; WEN Lishi

Division of Surface Engineering of Materials; Institute of Metal Research; The Chinese Academy of Sciences

SUN Chao; WANG Qimin; TANG Yongji; GUAN Qingfeng; GONG Jun; WEN Lishi. Microstructure and initial stage oxidation of NiCoCrAlY coatings deposited by arc ion plating technique. Acta Metall Sin, 2005, 41(11): 1167-1173 .

Abstract References Related Articles Recommended Metrics Download:  PDF(731KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The microstructure of the NiCoCrAlY coatings deposited by arc ion plating (AIP) and its oxidation mechanism at initial stage were investigated by XRD, SEM, TEM and photostimulated luminescence spectroscopy (PSLS). The results showed that as-deposited NiCoCrAlY coatings were composed of nano-grains and possessed apparent layered structure. After vacuum annealing, the layered microstructure disappeared and the coating became much denser. The nano-grains in the coatings became much larger and twinned grains appeared. In addition, a very thin oxide scale mainly of α-Al2O3 formed on the coating surface after annealing. In the subsequent initial oxidation stages, transient θ-Al2O3 increased and then turned into stable α-Al2O3. The related mechanism was also discussed. Key words:  NiCoCrAlY coating      arc ion plating      microstructure       Received:  30 June 2005      ZTFLH:  TG111.5     TG174.44   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors SUN Chao WANG Qimin TANG Yongji GUAN Qingfeng GONG Jun WEN Lishi URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I11/1167 [1] Padture N P, Gell M, Jordan E H. Science, 2002; 296: 280 [2] Nicholls J R. MRS Bull, 2003: 659 [3] Knotek O, Loffler F, Beele W. Surf Coat Technol, 1993;61:6 [4] Wang Q M, Wu Y N, Guo M H, Ke P L, Gong J, Sun C, Wen L S. Surf Coat Technol, 2005; 197: 68 [5] Nicholls J R, Simms N J, Chan W Y, Evans H E. Surf Coat Technol, 2002; 149: 236 [6] Guo M H, Wang Q M, Ke P L, Gong J, Sun C, Huang R F, Wen L S. Surf Coat Technol, in press [7] Wang F H, Lou H Y, Wu W T. Corros Sct Prot Technol, 1992; 4: 156 (王福会,搂翰一,吴维(?)．腐蚀科学与防护技术, 1992;4: 156) [8] Wang B, Song G H, Gong J, Sun C, Wen L S, Ham Y F. 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