Effect of Sintering Additive Composition on the Mechanical and Tribological Properties of Si3N4/SiC Ceramics

被引:0
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作者
Hu Hai-Long [1 ,2 ]
Zeng Yu-Ping [1 ]
Zuo Kai-Hui [1 ]
Xia Yong-Feng [1 ]
Yao Dong-Xu [1 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100864, Peoples R China
关键词
Si3N4/SiC ceramics; sintering additive; flexural strength; tribological properties; SILICON-NITRIDE CERAMICS; WEAR BEHAVIOR; ABRASIVE WEAR; MICROSTRUCTURE; FABRICATION; ALUMINA;
D O I
暂无
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
Two compositions of the Y2O3-Al2O3 (YA) and Y2O3-MgO (YM) systems were chosen to investigate the effect of sintering additive composition on the mechanical and tribological properties of gas pressure sintered Si3N4/SiC ceramics. The relative density, flexural strength, fracture toughness, hardness, coefficient of friction and wear rate were verified to depend substantially on the sintering additive composition. Compared with YM, the Si3N4/SiC ceramics with YA exhibit superior sinterability and show preferable mechanical and tribological properties, especially for the Si3N4/SiC ceramics with 20wt% SiC addition. These properties can be primarily attributed to the higher relative density and the grain size with smaller aspect ratio.
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页码:885 / 890
页数:6
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