The Effect of TaC Reinforcement on the Oxidation Resistance of CNTs/SiC CMCs
| Autor: | Qiaoyun Xie, Sylvanus N. Wosu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Thermal oxidation Materials science Mechanical Engineering Oxide Spark plasma sintering 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology Ceramic matrix composite 01 natural sciences law.invention chemistry.chemical_compound stomatognathic system chemistry Mechanics of Materials law 0103 physical sciences Silicon carbide General Materials Science Composite material 0210 nano-technology Layer (electronics) Tantalum carbide |
| Zdroj: | Journal of Materials Engineering and Performance. 25:874-883 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-016-1921-y |
| Popis: | This study focuses on a two-stage spark plasma sintering (SPS) of TaC and/or carbon nanotubes (CNTs)-reinforced SiC ceramic matrix composites (CMCs). The oxidation mechanism of SiC-based CMCs with CNTs reinforcement as well as the TaC additives effect on the thermal oxidation resistance of the SiC-CNTs-TaC systems are investigated. The oxidation behavior up to 1500 °C is characterized in terms of mass changes, oxide layer formation, and thickness. The results showed that more disorder occurred in the CNT network with increased oxidation temperature. TaC additives exhibited an enhanced protective effect in increasing the oxidation temperature of CNTs from 460 to 550 °C, and this protective effect was effective at 1200 °C achieved by the crystalized Ta2O5 which grew with a preferred orientation giving rise to the phase separation in the glassy protective layer. Degraded oxidation resistance was found at 1500 °C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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