Beschichtung für Turbinenkomponenten

摘要

An iridium-niobium alloy bond coat is used under a ceramic thermal barrier coating on turbine blades and vanes to improve the life of the thermal barrier coating. Between the bond coat and the substrate is an underlying protective coating which is either a low pressure plasma sprayed coating such as a NiCoCrAIY alloy or a vapor deposited coating such as tantalum, nickel-tantalum or rhenium. Heat treatment and preoxidation procedures may be used to form the desirable bonds and materials.