June 22-27, 2014
To enhance the performance of aircraft engines, high temperature materials are required being capable to operate at temperatures significantly higher than the temperature limit of about 1150°C approached for Ni-based superalloys currently employed. Nb/Nb5Si3-based composites are promising candidates for turbine engine applications at temperatures up to 1300°C, exhibiting balanced mechanical properties and reduced density compared to Ni-based superalloys . To use these composites in gas turbine combustion atmosphere, environmental/thermal barrier coatings (E/TBCs) are required to protect them against heat, degradation in flowing water vapour and chemical attack of calcium-magnesium-alumino-silicate (CMAS).
 B.P. Bewlay et al., MRS Bulletin 28 (2003) 646-653.  S. Knittel, S. Mathieu, L. Portebois, M. Vilasi, T. Katrina, C. Rapin, C. Petitjean, P.-J. Panteix, S. Drawin, this Conference