抄録
The oxidation resistance of Pt-Ir modified aluminized coatings, prepared by magnetron sputtering, was investigated. Cyclic oxidation tests revealed that Pt-30 at%Ir and Pt-50 at%Ir modified aluminide coatings demonstrated a smaller mass change compared with Pt, Pt-80 at%Ir and Ir modified aluminide coatings. Cross-sectional analyses following cyclic oxidation tests showed that the TGO layer formed on the Pt modified aluminide coating surface is almost twice as thick as those on the Pt-30 at%Ir and Pt-50 at%Ir coatings. In addition, the Pt-30 at%Ir and Pt-50 at%Ir samples had a much smoother surface than the Pt modified coatings after cyclic oxidation, and the latter suffered from severe surface rumpling. However, when the Ir content exceeded 80 at% in Pt-Ir modified coatings, internal voids formed during cyclic oxidation. These results show that the addition of 30-50 at%Ir to Pt-modified aluminized coatings is most effective in enhancing oxidation resistance.
本文言語 | English |
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ページ(範囲) | 53-64 |
ページ数 | 12 |
ジャーナル | Oxidation of Metals |
巻 | 68 |
号 | 1-2 |
DOI | |
出版ステータス | Published - 2007 8月 |
外部発表 | はい |
ASJC Scopus subject areas
- 無機化学
- 金属および合金
- 材料化学