Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

被引：47
|
作者：
An, Yumin [1 ]
Xu, Xianghong [2 ]
Gui, Kaixuan [1 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150001, Peoples R China
[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Graphene nanosheets; ZrB2-SiCw; Mechanical properties; TEMPERATURE; BEHAVIOR; MICROSTRUCTURE; RESISTANCE; OXIDATION;
D O I：
10.1016/j.ceramint.2016.06.014
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：
Ultrahigh temperature ZrB2-SiCw-Graphene ceramic composites are fabricated by hot pressing ZrB2-SiCw-Graphene oxide powders at 1950 degrees C and 30 MPa for 1 h. Tile microstructures of the composites are characterized by Scanning electron microscopy, Raman spectroscopy and X-ray diffraction. The results show that multilayer graphene nanosheets are achieved by thermal reduction of graphene oxide during sintering process. Compared with monolithic ZrB2 materials, flexural strength and fracture toughness are both improved due to tile synergistic effect of SiC whisker and graphene nanosheets. The toughening mechanisms mainly are the combination of SiC whisker and graphene nanosheets crack bridging, pulling out. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：14066 / 14070
页数：5
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