MoSi2-modified Cf/SiC composites with enhanced mechanical performance and oxidation resistance
| Autor: | Guangyuan Cui, Jiani Wang, Ruiying Luo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Modulus chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Oxygen Corrosion Matrix (chemical analysis) stomatognathic system Flexural strength chemistry Phase (matter) 0202 electrical engineering electronic engineering information engineering General Materials Science Interphase Composite material 0210 nano-technology Pyrolysis |
| Zdroj: | Corrosion Science. 160:108173 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2019.108173 |
| Popis: | Herein, we demonstrate the influence of MoSi2 addition on mechanical properties and high-temperature oxidation resistance of Cf/SiC-MoSi2p composites, synthesized by precursor infiltration pyrolysis (PIP) method. The results reveal that the incorporation of MoSi2 reduced the number of open pores and cracks in the composites and the flexural strength and modulus are significantly improved. The flexural strengths of Cf/SiC-MoSi2p composites in parallel and perpendicular direction were raised from 196 MPa and 160 MPa to 249 MPa and 197 MPa, which correspond to an increase of 27.0% and 23.1%, respectively. The oxidation resistance of Cf/SiC-MoSi2p composites at 1300℃ has also been improved due to the addition of MoSi2 particles. The post-oxidation structural and morphological characterization revealed that both SiC/MoSi2 matrix reacted with oxygen and formed a glass phase to heal the defects, which protected the carbon fibers and carbon interphase from oxidation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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