Synthesis, electromagnetic reflection loss and oxidation resistance of pyrolytic carbon-Si3N4 ceramics with dense Si3N4 coating

被引：29
|
作者：
Li, Xiangming [1 ]
Zhang, Litong [2 ]
Yin, Xiaowei [2 ]
机构：
[1] NW A&F Univ, Coll Water Resources & Architecture Engn, Yangling 712100, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Natl Key Lab Thermostruct Composite Mat, Xian 710072, Shaanxi, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 08期
关键词：
Si3N4; Porosity; Carbon; Chemical vapour deposition; Functional applications; SHIELDING EFFICIENCY; CONDUCTIVITY; BEHAVIOR;
D O I：
10.1016/j.jeurceramsoc.2012.01.027
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Si3N4-coated porous pyrolytic carbon-Si3N4 ceramics (PyC-Si3N4/Si3N4) were fabricated by chemical vapour infiltration of PyC into porous Si3N4 ceramic and then chemical vapour deposition of Si3N4 coating on the surface of the obtained PyC-Si3N4. The PyC-Si3N4/Si3N4 with 3.1 vol.% PyC content possesses electromagnetic reflection loss as low as -11.5 dB. Due to the excellent sealing effect of dense Si3N4 coating, the PyC-Si3N4/Si3N4 possesses good oxidation resistance, which makes PyC-Si3N4/Si3N4 a good electromagnetic absorbing material that can be used at temperature as high as 1100 degrees C. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1485 / 1489
页数：5
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