Advanced Aerospace Materials.

Kurzfassung

In aerospace application there is no approved material that could withstand the prevailing temperatures at a useful stress level. Therefore, cooling is inevitable in the hottest regions of the turbine. The present limit of about 1800 degrees centigrade is reached by single crystalline nickel-based casting alloys. Four material groups offer possibilities for a considerable step ahead: monolithic structural ceramics, IMP-materials, refractory materials. Materials based on ceramicsincorporate the inherent problems of brittle materials including titanium aluminides. Great effort is being undertaken to solve the problems. One of the solutions could be obtained by the application of hybrid components in order to admit only compressive stresses.