Abstract
To overcome the poor oxidation resistance of C/C composites, anti-oxidation SiC and ZrB2-SiC ceramics were introduced into C/C composites by chemical vapor infiltration (CVI) and precursor infiltration-pyrolysis (PIP). The microstructure, mechanical properties and oxidation resistance of C/C-SiC-ZrB2 composites were investigated. The ZrB2-SiC ceramic exhibits uniform dispersion and distribution in C/C composite. The C/C-SiC-ZrB2 composites pyrolyzed at 1500°C has the highest flexural strength (315 MPa) and fracture toughness (10.87 MPam1/2). The flexural strength, tensile strength and compressive strength increased with temperature. The C/C-SiC-ZrB2 composites exhibited low ablation characteristics in plasma ablation experiments, and the linear ablation rate was 3.67×10-3 mm/s. The composite material, which exhibited synergistic effect between toughening and oxidation resistance, has potential application in the field of hypersonic vehicle.
| Original language | English |
|---|---|
| State | Published - 2019 |
| Event | 22nd International Conference on Composite Materials, ICCM 2019 - Melbourne, Australia Duration: 11 Aug 2019 → 16 Aug 2019 |
Conference
| Conference | 22nd International Conference on Composite Materials, ICCM 2019 |
|---|---|
| Country/Territory | Australia |
| City | Melbourne |
| Period | 11/08/19 → 16/08/19 |
Keywords
- Mechanical properties
- Microstructure
- Oxidation resistance
- ZrB2
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