Construction of compound interface in SiCf/mullite ceramic-matrix composites for enhanced mechanical and microwave absorbing performance |
| |
| Affiliation: | 1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China;2. Shaanxi Huaqin Technology Industry Co., Ltd, Xi’an 710199, China;1. Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, China;2. State Key Laboratory of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3. Huabei Cooling Device Co., Ltd, Xianghe 065400, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. Center of Analysis, Measurement and Computing, Harbin Institute of Technology, Harbin, 150001, China;3. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150001, China;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi''an, Shaanxi 710072, China;2. Institute of China North Industry Group, No.52, Yantai 264003, China;3. School of Materials Science and Engineering, Chang''an University, Xi''an 710064, Shaanxi, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;2. College of Metallurgy and Materials Engineering, Hunan University of Technology, Zhuzhou, 412008, China;3. School of Physics and Electronics, Central South University, Changsha, 410083, China |
| |
| Abstract: | SiC fiber-reinforced mullite ceramic-matrix (SiCf/mullite) composite is a promising load-bearing and microwave absorption material. However, the strong interfacial bonding strength and low permittivity cause poor mechanical and absorption performance. Herein, we report SiCf/C-SiC/mullite composite containing a carbon nanosphere network (CNSN) in the SiC interface prepared by precursor infiltration and pyrolysis (PIP). Due to the contribution of CNSN towards interface debonding, fiber slipping, and individual fiber pull-out, the composite shows significant improvement in the flexural strength (by 187%, from 56.23 ± 4.89 MPa to 161.69 ± 13.43 MPa) and the failure displacements (by 238%, from 0.080 ± 0.006 mm to 0.271 ± 0.015 mm). Moreover, the real and imaginary parts of complex permittivity (ε′, ε″) are enhanced from 5.57 to 5.98–6.36–7.11 and from 1.27 to 1.95–2.97–4.69, respectively. Under the synergistic effect of appropriate impedance matching in company with effective conductive loss and multiple polarization loss, the effective absorption bandwidth (EAB) increases from 0.98 GHz to the entire X band, and the minimum reflection loss (RLmin) enhanced from ? 14.31 dB to ? 41.51 dB. |
| |
| Keywords: | Microwave absorption Carbon nanosphere network C-SiC interface PIP |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
