Indenter tip in contact with the material at 800 °C AerospaceHigh temperature thermal barrier coatings for turbine blades.. Innovative high temperature materials (ceramics, metals, coatings etc.).. Unique high temperature micro indentation testing to determine mechanical properties of local material....
To circumvent the limited progress foreseen in airfoil cooling design and high temperature properties of superalloys, thermal barrier coatings systems are used on both turbine blade and vanes to protect metallic part from the hot gas stream (1400 °C). Yttria partially stabilised zirconia (YPSZ) exhibits the best thermal and mechanical properties to accommodate the thermal expansion mismatch between 100 to 200µm thick ceramic coating and metallic substrate....
For next-generation turbomachines (1) to operate at gas temperatures up to 1600 °C, the solution consists in cooling nickel-based superalloy (2) turbine blades, which also have to be protected with a thermal barrier coating (3) made from zirconia for example (4).... Its mechanical properties are much better than the best steels '. (3) Thermal Barrier Coating :...
