During the engine bench test, low cyclic fatigue of N=994 cyclic with maximum speed n max=60000 r/min and N=100 cyclic with maximum speed n max=70000 r/min were completed. During the over rotation test, when the rotating speed reached n=104166 r/min, the blade in the turbine blisk broke and when the rotating speed reached n=108072 r/min, the disk in the turbine blisk broke. The maximum failure strength approached 300 MPa.
The mechanical performance evaluation, over rotation test and engine bench test were performed, respectively. The CT scan was conducted to characterize the internal defects in SiC/SiC turbine blisk. The environmental barrier coatings (EBCs) were prepared on the surface of SiC/SiC turbine blisk using the atmospheric plasma spraying (APS) method. The SiC/SiC turbine blisk was machined by "on-line processing" to form a turbine bisk that meets the design requirements. The BN interphase and SiC matrix were deposited on the surface of the SWS SiC fiber preform, respectively. The Spider Web Structure (SWS) SiC preform was used as the reinforcement in turbine blisk.
#TURBINE TEST STAND FLEXTURE VERIFICATION#
Design, fabrication, and experimental verification of SiC/SiC turbine blisk were investigated. Turbine rotor is the key component of gas turbine engines.
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