Improvement of cyclic oxidation resistance of a β-(Ni, Pt)Al coating by the addition of Ni/Ni-Re layer at 1150 ℃. (October 2022)

• Record Type: Journal Article
• Authors: Li, W.; Zhang, W.L.; Li, T.; Pen, X.; Sun, J.; Wang, T.G.; Jiang, S.M.; Gong, J.; Sun, C.
• Is Part Of: Corrosion science. Volume 207(2022)
• Publication Date: 2022-10
• Subjects: PtAl coating -- Nickel -- Rhenium -- Cyclic oxidation -- Hole; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110486
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: This paper studied the effect of adding Ni/NiRe layer on the high temperature oxidation behavior of β-(Ni, Pt)Al coating. Cyclic oxidation test of β-(Ni, Pt)Al coating, 0Re-(Ni, Pt)Al coating and 1Re-(Ni, Pt)Al coating were investigated at 1150 ℃ in this paper. Results indicated that adding Ni in the coating signally relieved the internal oxidation and improved the adhesion of scale for 0Re-(Ni, Pt)Al coating. Doping Re further enhanced cyclic oxidation property of 1Re-(Ni, Pt)Al coating. Besides, the oxidation process of three coatings, the effect of Ni/Ni-Re layer on the spallation of oxide scale and the formation mechanism of big holes were discussed. Highlights: Adding Ni/Ni-Re reduced the oxidation rate and extent of β to γ′ phase degeneration. The synergism effect of Pt/Re, lower Young's modulus and hardness jointly enhanced spallation resistance of oxide scale. Fearful internal oxidation and wide spallation of scale was avoided due to the existence of pure Ni layer. Big holes formed in 0Re-(Ni, Pt)Al coating due to the fast phase transform of β to γ′.