Oxidation resistance of electroplated Pt-Ir alloy coatings on Ni-based single crystal superalloys followed by diffusion annealing treatment

Yoshito Yasui, Hideyuki Murakami, Mikiyo Yoshida, Akihiro Sato, Akira Tateno, Seiji Kuroda, Hachiro Imai

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Oxidation resistance of electroplated Pt and Pt-Ir alloy coatings followed by simple annealing heat treatments was investigated. The so-called 2nd generation Ni-based single crystal superalloy TMS-82 + and 4th generation TMS-138 were used as substrate materials. The cyclic oxidation tests and corresponding surface observations suggested the comparable oxidation resistance of Pt-coated TMS-82 + and Pt-Ir-coated TMS-138. However, cross-sectional microstructural analysis revealed that Pt-coated TMS-82 + exhibited the accelerated formation of voids, indicating the beneficial effect of Ir addition in terms of suppressed void formation. This study also revealed the importance of cross sectional analysis for thoroughly evaluating specimens subjected to the cyclic oxidation tests, and confirmed that oxidation resistance of the electroplated coatings was dependent on the quality of films deposited, which was drastically affected by the substrate surface finishing and substrate composition.

本文言語English
ページ(範囲)913-918
ページ数6
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
73
12
DOI
出版ステータスPublished - 2009 12
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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