In high performance and highly efficient aviation gas turbine engines, abradable ceramic coating applied to control the gap sealing between the turbine shroud and the blade tip has certain porosity for making an optimal gap intentionally. However, low...
In high performance and highly efficient aviation gas turbine engines, abradable ceramic coating applied to control the gap sealing between the turbine shroud and the blade tip has certain porosity for making an optimal gap intentionally. However, lowered coating surface hardness due to the porosity is weak to erosive particles that may occur inside or outside the engine during operation and this unintentional wear can lead performance degradation and localized flow instability. This paper describes the design and manufacturing results of a test stand for ASTM G76 including powder injection system, test stand, and data acquisition system that can evaluate the erosion resistance of the abradable coating surface.