Design, fabrication, and testing of CVI-SiC/SiC turbine blisk under different load spectrums at elevated temperature

• DOI: 10.1515/htmp-2022-0007
• Publication Date: 2022-05-20T09:28:27Z
• Authors: Xiaojun Guo; Jian Li; Yuqi Zeng; Xiaozhong Huang; Longbiao Li; Youliang Xu; Xiaoan Hu
• Keywords: turbine blisk; Technology; T; Chemical technology; Chemicals: Manufacture, use, etc.; TP200-248; TP1-1185; 02 engineering and technology; high temperature; ceramic-matrix composites; 0205 materials engineering; natural frequency; damage

Abstract In this article, design, fabrication, and testing of SiC/SiC turbine blisk with the fiber’s preform Spider Web Structure (SWS) subjected to different load spectrums at elevated temperature are conducted. Micro-CT scans conducted show fibers defects inside SWS-SiC/SiC blisk. For 2D plain-woven composite under monotonic tensile loading an T = 900°C in air atmosphere, ultimate strength is σ uts 200 MPa fracture strain ε f 0.36%. rotation testing, first second order natural frequency tested using laser vibration meter. Relationships between speed, internal damage, degradation established. Under maximum speed n 17,000 rpm exhaust 930°C, no damage occurred However, multiple coating spalling due thermal-chemical coupling failure flame impingement. The decreases by 5% increase rotating from max 85,000 105,000 rpm, which indicates that there blisk, leads decrease stiffness