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Characterization and modelling of Ni based superalloy materials with a dual layered MCrAlY coating system
conference contribution
posted on 2014-03-14, 14:06 authored by Y. Liu, Mudith Karunaratne, Mark JepsonMark Jepson, Rachel ThomsonRachel ThomsonMultilayered MCrAlY type coatings have the potential to be
optimised to protect superalloy components against both corrosion
and oxidation simultaneously. In this paper, a dual layered coating
(NiCrAlY on top of a CoNiCrAlY coating) has been aged and the
microstructural evolution has been observed and quantified using
various electron microscopy based techniques. In addition, the
microstructural evolution of the coating has been modelled using
a diffusion based model capable of modelling the ageing of
multilayer coatings. It is demonstrated that the model is
reasonably accurate in predicting both the phase and chemical
distributions through the coating system during ageing, and
therefore has the potential to be used as a design tool for the
improvement of future layered coating systems.
Funding
We would like to acknowledge the support of The Energy Programme, which is a Research Councils UK cross council initiative led by EPSRC and contributed to by ESRC, NERC, BBSRC and STFC, and specifically the Supergen initiative (Grants GR/S86334/01 and EP/F029748) and the following companies; Alstom Power Ltd., E.ON, Doosan Babcock, National Physical Laboratory, Praxair Surface Technologies, QinetiQ, Rolls-Royce plc, RWE npower, Siemens Industrial Turbomachinery Ltd. and Tata Steel for their valuable contributions to the project.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Citation
LIU, Y. ... et al, 2012. Characterization and modelling of Ni based superalloy materials with a dual layered MCrAlY coating system. IN: Huron, E.S. et al (eds). Superalloys 2012: 12th International Symposium on Superalloys, Seven Springs, PA. John Wiley and sons, pp. 795 - 802.Publisher
© John Wiley and sonsVersion
- AM (Accepted Manuscript)
Publication date
2012Notes
This conference paper is closed access.ISBN
9780470943205Language
- en