MICROSTRUCTURE AND TEMPERING BEHAVIOR OF EVAPORATED RESP - THERMALLY SPRAYED ZRO2-LAYERS ON METALLIC SUBSTRATES

Because of their application in gas turbines plasmasprayed thermal bar rier coatings of partially stabilized zirconia on metallic substrates are an example for the technical use of ceramic-metal-composites. Prob lems especially concerning the interface adhesion are still partly not understood. In this paper several systems are examined by electron mi croscopy, which all consist of ceramic zirconia layers evaporated or t hermally sprayed on a metallic substrate. Priority is given to structu ral analysis. An attempt is made to lighten the interface morphology b y the method of cross section preparing, because thereby the possibili ty of aimed preparation is given.