The Microstructure and thermal diffusivity of carbon nanostructures/Si3N4 composites processed using spark plasma sintering

被引：7
|
作者：
Li, Yongxia [1 ]
Han, Wenbo [1 ]
Chen, Guiqing [1 ]
Cheng, Yehong [1 ]
Yang, Qiang [1 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Sintering; Microstructure-final; Thermal properties; Si3N4; SILICON-NITRIDE CERAMICS; GRAPHENE; CONDUCTIVITY; NANOTUBES;
D O I：
10.1016/j.ceramint.2016.09.099
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：
Graphene nanoribbons (GNRs) were obtained by unzipping multiwall carbon nanotubes (MWCNTs). Three different silicon nitride-carbon nanostructures were prepared by spark plasma sintering (SPS): ceramic composites that contained 1 wt% carbon nanofibers (CNFs), 1 wt% MWCNTs and 1 wt% GNRs respectively. The a to beta-Si3N4 transformation ratio and thermal diffusivity of GNR/Si3N4 composites were higher than both CNF/Si3N4 composites and MWCNT/Si3N4 composites. Furthermore, the higher thermal diffusivities of GNR/Si3N4 composites can primarily be attributed to the higher number of elongate beta-Si3N4 grains.
引用
收藏
页码：3435 / 3438
页数：4
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