Abstract
Silicon carbide fiber-reinforced mullite matrix (SiC f /Mu) composites were fabricated via an infiltration and sintering method. Effects of sintering parameters on microstructure, mechanical, dielectric and microwave absorption properties of SiC f /Mu composites have been investigated. The flexural strength is significantly improved with increasing sintering temperature, and the highest flexural strength of 213 MPa is obtained in vacuum at 1000 °C for 2 h. The performances of composites with different holding time are further studied at 1000 °C. The flexural strengths of composites sintered at 1000 °C for 2 and 4 h reach 213 and 219 MPa, respectively. The failure displacement of the composite sintered at 1000 °C for 4 h reaches 0.39 mm. The excellent microwave absorption properties are achieved for the composite sintered at 1000 °C for 2 h. The minimum reflection loss (RL) reaches −38 dB with a thickness of 2.9 mm at 12 GHz and the effective absorbing bandwidth (RL ≤ −10 dB) with a thickness of 3.4 mm covers the whole X−band, which indicate that SiC f /Mu composite is a good candidate for microwave absorbing materials. These results provide valuable solutions to obtaining structural-functional materials for microwave absorption applications in civil and military areas.
| Original language | English |
|---|---|
| Pages (from-to) | 11625-11632 |
| Number of pages | 8 |
| Journal | Ceramics International |
| Volume | 45 |
| Issue number | 9 |
| DOIs | |
| State | Published - 15 Jun 2019 |
Keywords
- Dielectric
- Mechanical property
- Microwave absorption
- Sintering temperature
- Sintering time
Fingerprint
Dive into the research topics of 'Effect of preparation conditions on mechanical, dielectric and microwave absorption properties of SiC fiber/mullite matrix composite'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver