Coating system including a mixed gadolinium pyrochlor phase

摘要

The layer system useful in gas turbine blades/vanes/heat shields, comprises a substrate (4) having a pyrochlore structure, an outer ceramic layer (13) on the substrate, an inner ceramic layer (10) present beneath the outer ceramic layer, and a metallic bonding layer (7) present on the substrate and beneath the outer ceramic layer. The inner ceramic layer has a thickness of 10-50% compared to the total layer thickness of the inner- and the outer ceramic layer of 400 mu m.