Siemens Aktiengesellschaft

Axel Kaiser

Ramesh Subramanian

Eckart Schumann

Werner Stamm

Georg Bostanjoglo

Jan Steinbach

Dimitrios Thomaidis

Jens Dietrich

Heat insulating layered systems should have a long service life in addition to excellent heat-insulating properties. Disclosed in an inventive layered system consisting of an external ceramic layer that has a mixed crystal consisting of gadolinium zirconate and gadolinium hafnate.

Layer system comprising gadolinium solid solution pyrochlore phase

Known protective coatings with a high Cr-content and silicon as an additive have brittle phases which become additionally brittle under the influence of carbon during use. The protective coating herein has a double metallic layer that only contains tantalum on the outside contents of the layers.

Layer system with double MCrAlX metallic layer

Known protective layers having high Cr content and additional silicon form brittle phases, which additionally become brittle under the effect of carbon during use. The protective layer according to the invention comprises a two-part metal layer, which contains tantalum on the outside.

Layer system having a two-ply metal layer

Heat-insulating layer systems have to be provided with along service life of the heat-insulating layer in addition to having good heat-insulating properties. The inventive layer system comprises a ceramic layer which contains a mixture of two pyrochlore phases.

Layer system comprising two pyrochlore phases

Thermal barrier coating layer systems, in addition to good thermal barrier properties, also have to have a long service life of the thermal barrier coating. The layer system according to the invention comprises a specially adapted layer sequence of metallic bonding layer, inner ceramic layer and outer ceramic layer.

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Neuss, Germany

Axel Kaiser