摘要
陶瓷基吸波材料由于其优良的化学稳定性、高温稳定性和较低的密度在提升武器装备隐身性能和解决电磁污染等问题上的重要地位日渐凸显。然而,传统的吸波涂层受限于设计维度和制备方法的局限性,不能兼顾结构-性能一体化的多样化需求。通过激光选区烧结(Selective laser sintering, SLS)技术辅以化学气相反应法(Chemical vapor reaction, CVR)引入原位自生SiC纳米线(SiCnw),能够制备出综合性能良好的SiCnw/SiC吸波陶瓷。研究表明,当二茂铁质量分数为1时,试样的介电常数实部(ε′)提高,介电常数虚部(ε′′)出现了两个显著的共振峰,最小反射损耗(RL)在试样厚度3.4 mm,电磁波频率8.94 GHz时取得为-40.60 dB,最大有效吸波带宽(EAB)为13.53 GHz。本研究为结构-吸波一体化SiCnw/SiC吸波陶瓷吸波陶瓷的增材制造提供了新的思路。
The importance of ceramic-based absorbing materials in enhancing the stealth performance of weaponry and addressing electromagnetic pollution issues is increasingly highlighted due to their excellent chemical stability,high-temperature stability,and low density.However,traditional absorbing coatings are limited in their ability to meet diverse demands for integrated structure-performance due to constraints in design dimensions and preparation methods.Selective laser sintering(SLS)technology can prepare SiC green parts and introduced in-situ grown SiC nanowire(SiCnw)through chemical vapor reaction(CVR)to prepare highly designable and comprehensively SiCnw/SiC absorbing ceramics.When the addition of ferrocene is 1wt%,the real part of dielectric constant(ε')of the sample is increased,and two significant formants of the imaginary part of dielectric constant(ε'')appeared.The minimum reflection loss(RL)is?40.60 dB when the thickness of the sample is 3.4 mm and the electromagnetic wave frequency is 8.94 GHz,and the maximum effective absorption bandwidth(EAB)is 13.53 GHz.This study provides a new idea for theadditive manufacturing of structure-absorbing integrated SiCnw/SiC absorbing ceramics.
作者
方志强
张扬泽
吴甲民
毛琛
陈颖
FANG Zhiqiang;ZHANG Yangze;WU Jiamin;MAO Chen;CHEN Ying(School of Materials Science and Engineering,Huazhong University of Science of Technology,Wuhan 430074;State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074;Engineering Research Center of Ceramic Materials for Additive Manufacturing of Ministry of Education,Wuhan 430074;Microwave Communication Materials and Devices Laboratory,WZ AMI of HUST,Wenzhou 325025)
出处
《机械工程学报》
北大核心
2025年第23期321-330,共10页
Journal of Mechanical Engineering
基金
国防科技大学新型陶瓷纤维及其复合材料重点实验室基金(6142907230301)
中央高校基本科研业务费专项资金(15882024XCZX002,2024JCYJ068)资助项目。
关键词
SiC吸波陶瓷
激光选区烧结
化学气相反应法
碳化硅纳米线
吸波性能
SiC absorbing ceramics
selective laser sintering
chemical vapor reaction
silicon carbide nanowire
absorbing performance
