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Diffusion behaviour of Pt in platinum aluminide coatings during thermal cycles

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      Abstract

      Two-phase PtAl2+β-(Ni,Pt)Al and single-phase β-(Ni,Pt)Al coatings were fabricated on DD5 Ni-based superalloy and pure Ni substrates. A coating/pure Ni substrate system was studied to determine the diffusion behaviour of Pt in the Ni–Al–Pt ternary system. The evolutions of morphology, phases and component concentration during thermal cycles were analysed. It was found that there is a phase shift from PtAl2 to β* in the two-phase coating, and Kirkendall porosity was observed in the single-phase coating. Our results further indicated that there are two different diffusion paths of Pt in the Ni–Al–Pt system.

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      Thermal-barrier coatings for more efficient gas-turbine engines

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        Surface rumpling of a (Ni, Pt)Al bond coat induced by cyclic oxidation

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          An analytical model of rumpling in thermal barrier coatings

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            Author and article information

            Affiliations
            a School of materials science and engineering, Shanghai University, Shanghai, China
            b AVIC commercial aircraft engine Co., Ltd., Shanghai, China
            Author notes
            [*] Correspondence address, Dr./Prof. Yanfeng Gao, School of Materials Science and Engineering, Shanghai University, 99 Shangda road, Shanghai, 200444, P. R. China, Tel.: +086-021-66138005, E-mail: yfgao@123456shu.edu.cn
            Journal
            ijmr
            International Journal of Materials Research
            Carl Hanser Verlag
            1862-5282
            2195-8556
            9 January 2018
            : 109
            : 1
            : 3-9
            MK111572
            10.3139/146.111572
            © 2018, Carl Hanser Verlag, München
            Counts
            References: 30, Pages: 7
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