Oxidation performance of nano-scale multilayer coatings on ?-TiAl

Ross, I.M., Rainforth, W.M., Zhou, Z., Walker, J.C., Reinhard, C., Ehiasarian, A.P., Hovsepian, P.E. and Braun, R. (2008) Oxidation performance of nano-scale multilayer coatings on ?-TiAl. Journal of Physics: Conference Series, 126, (1), 012022-[4pp]. (doi:10.1088/1742-6596/126/1/012022).


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There is a major drive to introduce ?-TiAl into gas turbine engines in order to reduce weight. However, this will require the development of coatings that protect against oxidation at high temperature, but do not adversely affect the mechanical properties. This work reports the high temperature degradation mechanisms of a nanoscale CrAlYN/CrN multilayer coating deposited on ?-TiAl(8Nb) by a combined high power impulse magnetron sputtering / unbalanced magnetron sputtering. Detailed TEM/STEM of FIB prepared specimens from isothermal static oxidation tests at 850°C for up to 1030 hours is presented. The evolution of the complex oxide structure and the implications for future coating development is discussed.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1088/1742-6596/126/1/012022
ISSNs: 1742-6588 (print)
1742-6596 (electronic)
Subjects: Q Science > QC Physics
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions : Faculty of Engineering and the Environment > Engineering Sciences > n CATS Research Group
ePrint ID: 157743
Accepted Date and Publication Date:
25 September 2008Made publicly available
Date Deposited: 05 Dec 2011 11:39
Last Modified: 31 Mar 2016 13:27
URI: http://eprints.soton.ac.uk/id/eprint/157743

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