Acta Metall Sin  1992, Vol. 28 Issue (10): 63-68    DOI:

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INFLUENCE OF DEFECTS ON PROPERTIES OF SPUTTERED CoCrAIY COATINGS

WANG Fuhui; LOU Hanyi; WU Weitao (Corrosion Science Laboratory; Institute of Corrosion and Protection of Metals; Academia Sinica; shenyang)

WANG Fuhui; LOU Hanyi; WU Weitao (Corrosion Science Laboratory; Institute of Corrosion and Protection of Metals; Academia Sinica; shenyang). INFLUENCE OF DEFECTS ON PROPERTIES OF SPUTTERED CoCrAIY COATINGS. Acta Metall Sin, 1992, 28(10): 63-68.

Abstract References Related Articles Recommended Metrics Download:  PDF(2396KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Influence of defects on oxidation, hot corrosion and thermal shock properties of sputtered Co-30Cr- 6Al-0.5Y coatings was investigated. In the coating, the nodular defect was observed to worsen severely the properties. For testing under oxidation condition, the nodular defect results in the internal oxidation of Al. No single Al oxide scale may be formed at 1100℃ owing to consumption of Al. Under hot corrosion, it becomes as short-path for diffusion of S through the coating, thus sulphuring the coating together with the substrate. During thermal shock testing, it may act as the source of cracking, and moreover, if cyclic stress applied, the cracks propagate toward the substrate, the thermal fatigue properties of coating will be worsened. Key words:  CoCrAlY coating      defect      oxidation      hot corrosion      thermal shock      Received:  18 October 1992      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1992/V28/I10/63 1 王福会,楼翰一,吴维(山文).腐蚀科学与防护技术,1992;4:156 2 Rickerby D S, Wood M I. J Vac Sci Technol, 1986; A4: 2557 3 Wang Fuhui, Lou Hanyi, Bai Linxiang. Chin J Met Sci Technol, 1990; 6: 61 4 楼翰一,王福会,嵇立润,张立新.金属学报,1989;25:B380 5 周浪,章守华,叶锐曾,高良.薄膜科学与技术,1990;3:28 6 Zhou Lang, Zhang Shouhua, Ye Ruizeng, Gao Liang. Chin J Met Sci Technol, 1989; 5: 346 7 Thornton J A. J Vac Sci Technol, 1974; 11: 666 8 Boone D H. Mater Sci Technol, 1986; 2: 220 9 Grossklau W, Ulion N E, Beale H A. Thin Solid Films, 1977; 40: 271 10 Bettridge D F, Ubank R G. Mater Sci Technol, 1986; 2: 232 11 Wang F, Lou H. 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