SPS Fabrication of ZrB2-SiC Ceramics Toughened by Zr2Al4C5 Compounds and Evaluation of Their Properties

被引：0
作者：
Guo Qilong [1 ,2 ]
Cao Wangzhi [1 ,2 ]
Gan Jizhong [2 ]
Pei Junjun [2 ]
Li Junguo [3 ]
Zhang Lianmeng [3 ]
机构：
[1] Northwest Univ Nationalities, Lanzhou 730124, Peoples R China
[2] Key Lab New Bldg Mat & Bldg Energy Efficiency Gan, Lanzhou 730124, Peoples R China
[3] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷
关键词：
ZrB2; ceramic; spark plasma sintering; Zr2Al4C5 laminated compounds; mechanical properties; MECHANICAL-PROPERTIES; COMPOSITES; ZIRCONIUM; MICROSTRUCTURE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The ZrB2/SiC/Zr2Al4C5 multi-phase ceramics with different volume contents of Zr2Al4C5 were synthesized by SPS at 1800 degrees C and 20 MPa. The adding of Zr2Al4C5 improves sintering properties and inhibits the coarsening of grains. The fracture toughness of ZrB2/SiC/Zr2Al4C5 multiphase ceramics with 30 vol% Zr2Al4C5 is 4.81 MPa.m(1/2), which is 20% higher than the ZrB2/SiC multiphase ceramic. The fracture mode exhibits a mixture of inter- and intra-granular fracture and the toughening mechanisms are the presence of laminated ZrxAlyCz. grains toughening, crack deflection and crack bridging.
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收藏
页码：187 / 191
页数：5
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