C106 EXPERIMENTAL STUDY OF HIGH TEMPERATURE WEAR RESISTANT COATINGS FOR GAS TURBINE COMPONENT

Abstract

In the contact section of industrial gas turbine parts, wear can be observed after normal operations. Especially, in the contact area of combustors and their fittings, such as a transition piece and a seal plate, the sever wear may occur owing to combustion vibration under high temperature. If such severe wear damage occurs, some inspections or repair can be needed. Though combustors and their fittings are subjected to high temperature condition without any lubricant, any relevant prevention has not developed yet. In this paper, wear resistance of ceramic hard coating materials, i.e. TiN, TiAlN, CrN, TiC, SiC, Al_2O_3 against various materials were tested under the condition similar to that in a gas turbine. It was concluded that the combination of Al_2O_3 coating and stellite #6B had excellent high temperature wear resistance.