COMBUSTION SYNTHESIS OF SILICON-NITRIDE SILICON-CARBIDE COMPOSITES

被引：18
|
作者：
AGRAFIOTIS, CC [1 ]
LIS, J [1 ]
PUSZYNSKI, JA [1 ]
HLAVACEK, V [1 ]
机构：
[1] STANISLAW STASZIC UNIV MIN & MET,INST MAT SCI,PL-30059 KRAKOW,POLAND
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 11期
关键词：
combustion synthesis; composites; self‐propagating high‐temperature synthesis; silicon carbide; silicon nitride;
D O I：
10.1111/j.1151-2916.1990.tb06488.x
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：
The feasibility of synthesizing silicon nitride‐silicon carbide composites by self‐propagating high‐temperature reactions is demonstrated. Various mixtures of silicon, silicon nitride, and carbon powders were ignited under a nitrogen pressure of 30 atm (∼ 3 MPa), to produce a wide composition range of Si3N4‐SiC powder products. Products containing up to 17 vol% of SiC, after being attrition milled, could be hot‐pressed to full density under 1700°C, 3000 psi (∼ 21 MPa) with 4 wt% of Y2O3. The microhardness and fracture toughness of these composites were superior to those of the pure β‐Si3N4 matrix material and compared very well with the properties of “traditionally” prepared composites. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：3514 / 3517
页数：4
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