FOR GASTURBINMOTORER AVSEDD, MED KERAMISK YTA FORSEDD TETNING MOT YTTERLUFTEN

摘要

Outer air seal structures of particular suitability for use in gas turbine engines are disclosed. Techniques for improving resistance to erosion while maintaining good abradability are discussed. In one particular structure the ceramic facing material of an outer air seal (30) at the leading edge region (36) is densified by a plasma gun to produce a glazed area (52) which is resistant to erosion.