Evaluation of mechanical properties of a dense SiC/SiCN composite produced via PIP process |
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| Affiliation: | 1. Institute of Structures and Design, German Aerospace Center Stuttgart, Pfaffenwaldring 38-40, 70569, Stuttgart, Germany;2. Advanced Ceramics, University of Bremen, Am Biologischen Garten 2, 28359, Bremen, Germany;3. Institute of Materials Resource Management, University of Augsburg, Am Technologiezentrum 8, 86159, Augsburg, Germany;1. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravska cesta 9, 845 36, Bratislava, Slovakia;2. NPU-SAS Joint Research Center, School of Materials Science, Northwestern Polytechnical University, Xi’an, 710072, Shaanxi, China;3. Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, IN, 46556, United States;4. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46556, United States;1. Department of Mechanical Engineering, College of Engineering Guindy Campus, Anna University, Chennai 600025, India;2. Laboratory for High Performance Ceramics, Department of Metallurgical and Materials Engineering & Ceramic Technologies Group-Centre of Excellence in Materials & Manufacturing for Futuristic Mobility, Indian Institute of Technology-Madras (IIT Madras), Chennai 600036, India;3. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India;1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China;3. The 31st Research Institute of China Aerospace Science and Industry Corp, Beijing, 100074, China;4. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;2. National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, China;3. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;4. College of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha, China;5. Advanced Ceramics, University of Bremen, Bremen 28359, Germany |
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| Abstract: | The material behavior of Polymer Infiltration and Pyrolysis based SiC/SiCN composites is studied and the characteristic thermal and mechanical properties in on- (0/90 °) and off-axis (±45 °) direction are summarized. The tensile properties are determined at room temperature and 1300 °C. Based on the ratio of Young’s modulus and strength between on- and off-axis loading, a new approach for the classification of Weak Matrix Composites (WMC) and Weak Interface Composites (WIC) is proposed, which seems to be reasonable for various CMCs. Even without fibre coating mechanical behavior of SiC/SiCN is similar to that of WIC. In order to explain this, a microstructure model is developed and confirmed by analysis of fracture surface. The effect of temperature on the tensile properties is investigated through analysis of residual thermal stresses. Even though at 1300 °C the strength is slightly lower, the fracture strain increased significantly from RT to 1300 °C. |
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| Keywords: | Ceramic-matrix composites (CMCs) SiC/SiCN Mechanical behavior Weak Matrix Composites (WMC) and Weak Interface Composites (WIC) High-temperature properties |
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