Comparative study on oxidation behavior of selected MCrAlY coatings by elemental concentration profile analysis

D. Seo, K. Ogawa, Y. Suzuki, K. Ichimura, Tetsuo Shoji, S. Murata

研究成果: Article査読

40 被引用数 (Scopus)

抄録

In this work, the high temperature oxidation behavior of selected MCrAlY overlay coatings has been investigated using the elemental concentration profile analysis. Emphasis is placed upon the influence of chemical composition on the oxidation. The results show that the oxide scale formation on coatings is considerably influenced by the microstructure of coating, the chemical composition of M as well as CrAlY, and the interdiffusion from substrate. If an element exists only in the one side of the overlay coating system, the diffusion amount of that particular element becomes higher. The vacancies which formed near the substrate/coating interface after thermal exposure could be generated by the diffusion of Ni and Al. A seriously diffusion-affected zone between substrate and coating are observed within 80 μm from the substrate/coating interface toward the coating surface. The cobalt-including CoCrAlYs and CoNiCrAlYs outperform the nickel-based system under the high temperature oxidizing condition.

本文言語English
ページ(範囲)2581-2590
ページ数10
ジャーナルApplied Surface Science
255
5 PART 2
DOI
出版ステータスPublished - 2008 12月 30

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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