Effect of Hf addition on oxidation properties of Pt-Ir modified aluminide coating

Akihiro Yamaguchi, Hideyuki Murakami, Seiji Kuroda, Hachiro Imai

研究成果: Article

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In the present study, the effect of Hf addition on oxidation kinetics of Pt-Ir modified aluminide coatings was investigated. Pt-15 at%Ir and Pt-15 at%Ir with trace amount of Hf films with 7-8 μm thick were deposited on a Ni-based single crystal superalloy TMS-82+ using magnetron sputtering, followed by a diffusion treatment and conventional Al pack cementation. While there were no significant microstructual differences observed in as aluminized specimens, cyclic oxidation test at 1423 K revealed clear advantages of Hf addition. Hf containing coatings showed smaller mass change with retarded surface rumpling during cyclic oxidation test. These results confirmed the beneficial effects of Hf addition reported for other alloy systems such as Pt modified γ-γ′ coatings and Pt modified aluminide coatings.

元の言語English
ページ(範囲)2422-2426
ページ数5
ジャーナルMaterials Transactions
48
発行部数9
DOI
出版物ステータスPublished - 2007 9 1
外部発表Yes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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