A dense and fine-grained SiC/Ti3Si(Al)C2 composite and its high-temperature oxidation behavior |
| |
| Authors: | Shibo Li Gui-Ming Song Yang Zhou |
| |
| Affiliation: | 1. Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands;3. Research and Development, Xycarb Ceramics, Schunk-Group, Zuiddijk 4, 5706 CS Helmond, The Netherlands;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;2. Xi’an Golden-mountain Ceramic Composites Co., Ltd., Xi’an, Shaanxi 710072, China;1. Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Institute of Glass and Ceramics, Department of Materials Science, University of Erlangen-Nürnberg, Martensstr. 5, 91058 Erlangen, Germany;3. Institute of Micro- and Nanostructure Research (WW9) & Center for Nanoanalysis and Electron Microscopy (CENEM), Department of Materials Science and Engineering, FAU Erlangen-Nürnberg, Cauerstr. 6, 91058 Erlangen, Germany;1. Department of Materials Science, Institute of Glass and Ceramics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany;2. Department of Mechanical Engineering, Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;3. Department of Chemical Engineering, Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;4. Northwestern Polytechnical University, Science and Technology on Thermostructure Composite Materials Laboratory, Xi’an 710072, Shaanxi, People''s Republic of China |
| |
| Abstract: | A dense SiC/Ti3Si(Al)C2 composite was synthesized by in situ hot pressing powders of Si, TiC and Al as a sintering additive at 1500 °C for 2 h under 30 MPa in Ar atmosphere. This composite has a fine-grained and homogeneous microstructure with grain sizes of 5 μm for Ti3Si(Al)C2 and of 1 μm for SiC. The SiC/Ti3Si(Al)C2 composite possesses an improved oxidation resistance, with parabolic rate constants of 4.57 × 10?8 kg2/m4/s at 1200 °C and 1.31 × 10?7 kg2/m4/s at 1300 °C. This study provides an experimental evidence to confirm the formation of amorphous phases in the oxide scale of the SiC/Ti3Si(Al)C2 composite. Microstructure and phase composition of the SiC/Ti3Si(Al)C2 composite and oxide scales were identified by X-ray diffractometry and scanning electron microscopy. The mechanism for the enhanced oxidation resistance has been discussed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
