Design, Fabrication and Testing of CMC Turbine Blisk

In this chapter, the design, fabrication and testing of CMC turbine blisk were investigated. The service performance analysis of the turbine blisk was at first analyzed. The spider web structure (SWS) fiber preform was adopted as the reinforcement elements of the turbine blisk. The BN interphase and SiC matrix were deposited on the SWS fiber preform, and during the fabrication, the on-line machining were conducted to control the shape and dimension of the blisk. The environmental barrier coatings (EBCs) were prepared on the surface of the SiC/SiC turbine blisk using the atmospheric plasma spraying (APS) method. The XCT scan was conducted to characterize the internal defects in the SiC/SiC turbine blisk. The mechanical performance evaluation, over rotation test and engine bench test were performed, respectively. Finally, the SiC/SiC turbine blisk was installed on an aircraft and completed the first flight testing, which verified the feasibility of the SiC/SiC turbine rotor for gas turbine engine application and accumulated valuable experience for the subsequent development of CMC hot-section components.