Hot corrosion behavior of Pt-Ir modified aluminide coatings on the nickel-base single crystal superalloy TMS-82+

Ying Na Wu, A. Yamaguchi, Hideyuki Murakami, S. Kuroda

研究成果: Article

16 引用 (Scopus)

抄録

Platinum-iridium films (Ir = 0, 32, 46, 83, 100 at.%) were deposited on the nickel-base single crystal superalloy through magnetron sputtering. After annealing and aluminizing, the Pt-Ir modified aluminide coatings mainly consisted of PtAl2 and β-(Ni,Pt,Ir)Al phases. Hot corrosion resistance of Pt-Ir modified aluminide coatings with the different Ir contents were evaluated by exposure at 1173 K in the presence of the 90%Na2SO4 + 10%NaCl (wt%) salt deposits. The corrosion kinetics curves of the specimens were plotted up to 100 h heating time. The phase constitution, morphology of corrosion products, and element concentrations along the cross section were also measured. The lowest mass gain (0.299 mg/cm2, after 100 h) was observed for Pt-46Ir aluminide coating because the dense and continuous protective Al2O3 scale formed. Phase transformation from β-(Ni,Pt)Al to γ′- (Ni,Pt)3Al, characteristics of the scale, and protection by P t/Ir enriched layer had the important effects on the hot corrosion behavior of modified aluminide coatings.

元の言語English
ページ(範囲)206-216
ページ数11
ジャーナルJournal of Materials Research
22
発行部数1
DOI
出版物ステータスPublished - 2007 1 1
外部発表Yes

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hot corrosion
heat resistant alloys
Nickel
Superalloys
Single crystals
nickel
Corrosion
coatings
Coatings
single crystals
corrosion
Salt deposits
aluminum coatings
Iridium
constitution
iridium
Platinum
corrosion resistance
Magnetron sputtering
phase transformations

ASJC Scopus subject areas

  • Materials Science(all)

これを引用

Hot corrosion behavior of Pt-Ir modified aluminide coatings on the nickel-base single crystal superalloy TMS-82+. / Wu, Ying Na; Yamaguchi, A.; Murakami, Hideyuki; Kuroda, S.

:: Journal of Materials Research, 巻 22, 番号 1, 01.01.2007, p. 206-216.

研究成果: Article

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abstract = "Platinum-iridium films (Ir = 0, 32, 46, 83, 100 at.{\%}) were deposited on the nickel-base single crystal superalloy through magnetron sputtering. After annealing and aluminizing, the Pt-Ir modified aluminide coatings mainly consisted of PtAl2 and β-(Ni,Pt,Ir)Al phases. Hot corrosion resistance of Pt-Ir modified aluminide coatings with the different Ir contents were evaluated by exposure at 1173 K in the presence of the 90{\%}Na2SO4 + 10{\%}NaCl (wt{\%}) salt deposits. The corrosion kinetics curves of the specimens were plotted up to 100 h heating time. The phase constitution, morphology of corrosion products, and element concentrations along the cross section were also measured. The lowest mass gain (0.299 mg/cm2, after 100 h) was observed for Pt-46Ir aluminide coating because the dense and continuous protective Al2O3 scale formed. Phase transformation from β-(Ni,Pt)Al to γ′- (Ni,Pt)3Al, characteristics of the scale, and protection by P t/Ir enriched layer had the important effects on the hot corrosion behavior of modified aluminide coatings.",
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AU - Kuroda, S.

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N2 - Platinum-iridium films (Ir = 0, 32, 46, 83, 100 at.%) were deposited on the nickel-base single crystal superalloy through magnetron sputtering. After annealing and aluminizing, the Pt-Ir modified aluminide coatings mainly consisted of PtAl2 and β-(Ni,Pt,Ir)Al phases. Hot corrosion resistance of Pt-Ir modified aluminide coatings with the different Ir contents were evaluated by exposure at 1173 K in the presence of the 90%Na2SO4 + 10%NaCl (wt%) salt deposits. The corrosion kinetics curves of the specimens were plotted up to 100 h heating time. The phase constitution, morphology of corrosion products, and element concentrations along the cross section were also measured. The lowest mass gain (0.299 mg/cm2, after 100 h) was observed for Pt-46Ir aluminide coating because the dense and continuous protective Al2O3 scale formed. Phase transformation from β-(Ni,Pt)Al to γ′- (Ni,Pt)3Al, characteristics of the scale, and protection by P t/Ir enriched layer had the important effects on the hot corrosion behavior of modified aluminide coatings.

AB - Platinum-iridium films (Ir = 0, 32, 46, 83, 100 at.%) were deposited on the nickel-base single crystal superalloy through magnetron sputtering. After annealing and aluminizing, the Pt-Ir modified aluminide coatings mainly consisted of PtAl2 and β-(Ni,Pt,Ir)Al phases. Hot corrosion resistance of Pt-Ir modified aluminide coatings with the different Ir contents were evaluated by exposure at 1173 K in the presence of the 90%Na2SO4 + 10%NaCl (wt%) salt deposits. The corrosion kinetics curves of the specimens were plotted up to 100 h heating time. The phase constitution, morphology of corrosion products, and element concentrations along the cross section were also measured. The lowest mass gain (0.299 mg/cm2, after 100 h) was observed for Pt-46Ir aluminide coating because the dense and continuous protective Al2O3 scale formed. Phase transformation from β-(Ni,Pt)Al to γ′- (Ni,Pt)3Al, characteristics of the scale, and protection by P t/Ir enriched layer had the important effects on the hot corrosion behavior of modified aluminide coatings.

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