IGTC-42 A Fundamental Study on the Application of FGM to Gas Turbine Members(Session B-8 MATERIAL AND FABRICATION)

概要

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The fundamental evaluation method of the functionally gradient material (FGM) applied to the combined condition of thermal and mechanical load has been developed, which condition is commonly observed in rotating gas turbine members. The pipe-shaped FGM test pieces were heated from their outer side and simultaneously cooled from their inner side. Under this condition, they were subjected to one-dimensional mechanical loads by a tension test apparatus. Their thermal barrier effect and mechanical damage have been investigated to evaluate the practical property of FGMs. With the combination of 8Y-PSZ and NiCoCrAlY as the two component materials of the FGM, at some hundredkW/m^2 level heat flux, it has been shown that the FGMs have an equally good bonding property compared with the conventional thermal barrier coating (2 layered TBC) having the same material combination. A fundamental evaluation method under the combined condition has been established.