Materials and metallic structures
Development of new high temperature bulk materials:
superalloys for turbine disks and blades, titanium aluminides, silicides
Pairs of a/2<110> dislocations shearing 
' precipitates in wrought U720 LI superalloy tensile strained at room temperature
Activities
- Research of new compositions of nickel-based superalloys for disks and blades of gas turbine engines.
- Study of the influence of process parameters and thermal treatments on the microstructure of nickel-based superalloys.
- Study of the relationships between microstructure, basic deformation mechanisms and mechanical behaviour of disk and blade superalloys.
- Optimisation of chemical compositions and characterisation of TiAl alloys with high strength at elevated temperature, processed by casting and hot forming.
- Study of strain-hardening and cyclic damage of TiAl alloys processed by the powder metallurgy route.
- Development of an anti-corrosion and anti-oxidation coating for TiAl alloys.
- Study of the oxidation reaction mechanisms of niobium-doped titanium aluminides.
- Development, characterisation and study of the behaviour of new composite alloys based on niobium silicides, processed by arc-melting.
- Study of NbHfTiSi/(NbHfTi)5Si3 multi-layer materials processed by cathode sputtering.
- Investigation of new ways to develop Nb-Si and Mo-Si based materials for high temperature components of gas turbines operating at about 1300°C.
Illustrations
Dislocation structure in a single crystal superalloy creep strained at 760°C
Secondary and tertiary 
’ phase precipitates in a disk superalloy processed by powder metallurgy
Influence of the thermal treatment temperature on the area fractions of phases in the TiAl GE alloy processed by powder metallurgy
Microstructure of a Nb-10%atSi alloy processed by arc-melting
Microstructure of a Nb(Ti, Hf)/Nb(Ti, Hf)5Si3
multi-layer material processed by EBPVD
