Microstructure and mechanical behavior of the Cf/Ti3SiC2-SiC composites fabricated by compression molding and pressureless sintering
| Autor: | Chuanyin Xiong, Chen Tang, Tingkai Zhao, Shasha Jiao, Tiehu Li, Junjie Gao, Shilei Kang, Hao Li |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Toughness Materials science Process Chemistry and Technology Composite number Compression molding 02 engineering and technology 021001 nanoscience & nanotechnology Ceramic matrix composite Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Brittleness Flexural strength 0103 physical sciences Materials Chemistry Ceramics and Composites MAX phases Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 43:16204-16209 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.08.198 |
| Popis: | C f /Ti 3 SiC 2 -SiC composites with different content of short carbon fibers were fabricated by the combination of compression molding and pressureless sintering. Microstructure and mechanical behavior of the composites were studied to evaluate the comprehensive performance of the material. In comparison, composites without carbon fibers were also fabricated in the same way. The results indicate that Ti 3 SiC 2 phases were synthesized in each cases and exhibit typical laminated structure with smooth surface. With the increase of carbon fiber content, composites turn from brittle to toughness, and show obvious elastic and no-linear regions on the force-displacement curve. Moreover, composite with 30% (volume fraction) carbon fiber shows the highest flexural strength (284.03 MPa), open porosity (15.78%), and lowest density (2.37 g cm −3 ). There were chemical reactions occurred between carbon fibers and matrix which formed strong covalent bonds and interfaces. The micrographs also reveal that fiber bridging and pulling-out are the most important reinforcement mechanisms which contribute to the mechanical properties of the composites. |
| Databáze: | OpenAIRE |
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