A NEW DESIGNED 1200 ℃ HIGH TEMPERATURE INSTRUMENTED NANOINDENTATION PROBE TO INVESTIGATE THE MECHANICAL BEHAVIOR OF MATERIALS

摘要

The integrity of thermal barrier coating systems is strongly influenced by the mechanical properties of the different layers constituting them, in particular the metallic bondcoat (NiAl-based or MCrAlY alloy). At high temperature, interdiffusion and oxidation phenomena cause changes in the composition of the bondcoats and as a result their mechanical behaviour is likely to change also. To determine the mechanical behaviour of such alloys in particular, Onera initially designed and developed a high temperature instrumented microindenter capable of functioning up to 1000℃. In a second time, Michalex has developed his own instrumented nanoindenter using Onera know-how.