摘要
本文利用PIP工艺制备出结构功能一体化的透波复合材料,该材料由莫来石纤维、BN涂层和Si BN陶瓷复合而成。根据先驱体的主要特性确定了具体的实验参数和制备流程。所制备的复合材料的弯曲强度、拉伸强度和压缩强度分别为95.1 MPa、35.0 MPa和80.9 MPa,室温介电常数和介电损耗分别为4.17和9.7×10^(-3),同时该复合材料还具备较低的介电常数变化率(温度每变化100°C,介电常数变化约2.01%)。
A structural-functional integrative wave-transparent material, consisted of BN coating and SiBN substrate, is synthesized through precursor infiltration pyrolysis （PIP） process. The technical parameters and procedures are obtained according to the key properties of the precursors. The composite exhibits good bending strength （- 95.1 MPa）, tensile strength （- 35.0 MPa） and compressive strength （- 80.9 MPa）. Moreover the composite displays a low dielectric constant （4.17） and a low loss tangent （×10-3） at room temperature. The composite has a low changing rate of dielectric constant （- 2.01% per 100℃）. These results imply that the composite with excellent mechanical and dielectric properties can be an excellent wave-transparent material applied in the fields of aerospace.
出处
《现代技术陶瓷》
CAS
2016年第4期270-279,共10页
Advanced Ceramics
基金
国家自然科学基金(51202231)
先进复合材料国家重点实验室(9140C440412130C44004)
