陶瓷基复合材料涡轮叶盘设计、制备与考核验证

涡轮转子是燃气涡轮发动机的核心部件。针对SiC/SiC涡轮叶盘设计、制备与考核验证开展研究，采用蛛网仿形(SWS)SiC纤维预制体作为涡轮叶盘的增强体，预制体表面分别沉积BN界面相与SiC基体，通“在线加工”方式对SiC/SiC涡轮叶盘分别进行粗加工和精加工，采用大气等离子喷涂方法制备环境障碍涂层，形成满足设计要求的涡轮叶盘。采用CT对SiC/SiC涡轮叶盘进行无损检测，表征叶盘内部缺陷分布。针对制备的SiC/SiC涡轮叶盘开展性能评价、超转试验、台架试验等考核验证，研究表明：SiC/SiC涡轮叶盘最大破坏强度达到300 MPa；在室温超转试验中，当转速达到n=104 166 r/min时，叶片发生断裂，当转速达到n=108 072 r/min时，轮体发生破裂；在发动机台架试验中，累积完成了N=994次最高转速n_max=60 000 r/min的循环载荷及N=100次最高转速n_max=70 000 r/min的循环载荷试车考核。2022年1月1日，SiC/SiC涡轮叶盘在株洲成功完成了首次飞行试验验证，这也是国内陶瓷基复合材料转子首次配装平台...

Design,fabrication and testing of ceramic-matrix composite turbine blisk

Turbine rotor is the key component of gas turbine engines. Design, fabrication, and experimental verification of SiC/SiC turbine blisk were investigated. The Spider Web Structure (SWS) SiC preform was used as the reinforcement in turbine blisk. The BN interphase and SiC matrix were deposited on the surface of the SWS SiC fiber preform, respectively. The SiC/SiC turbine blisk was machined by "on-line processing" to form a turbine bisk that meets the design requirements. The environmental barrier coatings (EBCs) were prepared on the surface of SiC/SiC turbine blisk using the atmospheric plasma spraying (APS) method. The CT scan was conducted to characterize the internal defects in SiC/SiC turbine blisk. The mechanical performance evaluation, over rotation test and engine bench test were performed, respectively. The maximum failure strength approached 300 MPa. 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. 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. On January 1, 2022, the SiC/SiC turbine blisk successfully completed the first flight test in Zhuzhou, which is also the first flight test of the domestic SiC/SiC rotor assembly platform and verified the feasibility of SiC/SiC turbine rotor application in gas turbine engines.