(SiC-Si3N4)w/SiBCN composite ceramics with tunable electromagnetic properties
(SiC-Si3N4)w/SiBCN composite ceramics with tunable electromagnetic properties
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电磁性能可调的(SiC-Si3N4)(w)/SiBCN复合陶瓷
DOI：
10.1016/j.jallcom.2019.05.192
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发表时间：
2019-08
影响因子：
6.2
通讯作者：
Yin Xiaowei
中科院分区：
文献类型：
--
作者：
Li Mingxing;Cheng Laifei;Mo Ran;Ye Fang;Yin Xiaowei
本研究以碳化硅-氮化硅杂化材料为基础，研制出电磁性能可调的复相陶瓷。首先，通过在SiCw-Si粉末压坯中氮化Si制备了不同浓度的SiCw(SiCw)晶须预制棒。原位生长的Si3N4晶须(Si3N4w)均匀分散在SiCw形成的互连网络内的空隙中。晶须增强体通过界面脱粘、裂纹偏转和晶须拔出等机制有效地增韧了SiBCN基体。通过调整(SiC-Si3N4)预制体的组成可以调节复合陶瓷的电磁性能。 体积分数为31.9 %SiCw的复合陶瓷在X波段具有最宽的有效吸收带宽(EAB)，达到2.9 GHz。为进一步提高吸波性能，构建了一种由梯度电磁参数陶瓷复合材料构成的多层雷达吸波结构。通过调整RAS的结构，得到的RAS EAB覆盖了整个X波段。
In this study, composite ceramics with tunable electromagnetic properties were developed based on SiC-Si3N4hybrids. First, SiC-Si3N4whisker preforms with various SiC whisker (SiCw) concentrations were prepared by the nitridation of Si in SiCw-Si powder compacts. Thein-situ-grown Si3N4whiskers (Si3N4w) were dispersed uniformly in the voids inside the interconnected network formed by SiCw. The whisker reinforcements effectively toughened the SiBCN matrix through interface debonding, crack deflection and whisker pullout mechanisms. The electromagnetic properties of the composite ceramics can be tuned by adjusting the composition of (SiC-Si3N4)wpreforms. The composite ceramic with 31.9 vol% SiCwexhibited the broadest effective absorption bandwidth (EAB) of 2.9 GHz in X band. Furthermore, a multilayer radar absorbing structure (RAS) composed of ceramic composites with gradient electromagnetic parameters was constructed to further improve the absorption properties. By adjusting the structure of the RAS, the resulting EAB of the RAS covered the entire X band.
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影响因子：
3.9
作者：
R. Gerhardt;R. Ruh
通讯作者：
R. Gerhardt;R. Ruh
影响因子：
10.9
作者：
Ding, Donghai;Shi, Yimin;Chen, Jin
通讯作者：
Chen, Jin
影响因子：
10.8
作者：
Cheng, Guangming;Chang, Tzu-Hsuan;Zhu, Yong
通讯作者：
Zhu, Yong
DOI：
10.1098/rsta.1995.0048
发表时间：
1995-06
期刊：
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences
影响因子：
--
作者：
R. Naslain;T. Khan;M. Steen;Peter Holmes
通讯作者：
R. Naslain;T. Khan;M. Steen;Peter Holmes
影响因子：
0.9
作者：
J. Mukerji
通讯作者：
J. Mukerji