| 摘要: |
| 开发兼具优异电磁波吸收性能和良好力学性能的材料对于满足军事环境的要求至关重要。本研究以T300碳纤维为原始材料，与氧化铝溶胶和硅溶胶混合制备碳纤维增强莫来石（Cf/莫来石）复合材料，在700 ℃的温度处理条件下，Cf/莫来石复合材料具有良好的电磁波吸收性能，并且具有较低的介电常数，其在1.90 mm时，对应17.12 GHz的频率处，反射损耗最小，为-14.28 dB。此外，在厚度为2.1 mm时，其最大有效吸收带宽为3.61 GHz。为满足高温条件下的力学性能要求，复合材料在500 ℃处理条件下的最大抗压强度达到292.19 MPa。这项研究为未来飞行器的材料选择提供了见解，特别是在高温和雷达探测环境中。 |
| 关键词: Cf/莫来石复合材料 高温 电磁波吸收 抗压强度 |
| 基金项目: |
|
| Effect of Oxidation Treatment at Different Temperatures on the Properties of Carbon Fiber/Mullite Composites |
|
Mao Bangxiao1, Xia Xisheng1, Wang Dakui2, Yang Guangren1, Gao Guosheng1, Li Chunhui1, Lyu Yongxi1, Fu Huibin1
|
|
1. Beijing Xinfeng Aerospace Equipment Co., Ltd., Beijing 100854;2. Beijing Institute of Electronic System Engineering, Beijing 100854
|
| Abstract: |
| Developing materials that possess both excellent electromagnetic wave absorption performance and good mechanical properties is crucial for meeting the demands of the military environment. In this study, the carbon fiber reinforced mullite (Cf/mullite) composites were prepared using T300 carbon fiber as the starting material, along with a mixture of alumina sol and silica sol. The Cf/mullite composites exhibited good electromagnetic wave absorption performance under temperature treatment conditions of 700 ℃ and had a lower dielectric constant, which achieved a minimum reflection loss of -14.28 dB at 1.90 mm, corresponding to a frequency of 17.12 GHz. Additionally, it demonstrated a maximum effective absorption bandwidth of 3.61 GHz at a thickness of 2.10 mm. To meet the mechanical performance requirements under high-temperature conditions, the composites attained a maximum compressive strength of 292.19 MPa under treatment conditions of 500 ℃. This study provides insights into material selection for future aircraft, particularly in high-temperature and radar detection environments. |
| Key words: Cf/mullite composites high-temperature electromagnetic wave absorption compressive strength |
