The effect of nano-sized SiC dispersion on fracture toughness of Si3N4

被引：0

作者：

Kinemuchi, Y ^{[1
]}

Yanai, T ^{[1
]}

Ishizaki, K ^{[1
]}

机构：

[1] Nagaoka Univ Technol, Nagaoka, Niigata 9402188, Japan

来源：

CERAMIC MATERIAL SYSTEMS WITH COMPOSITE STRUCTURES: TOWARDS OPTIMUM INTERFACE CONTROL AND DESIGN | 1998年

关键词：

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：

It is extremely difficult to obtain fully densified ceramics, especially large mechanical components by sintering powders. Thus the influence of pores must be considered when designing ceramics. In order to apply ceramics as a structural material, the influence of pores on the mechanical properties must be reduced. As the modification, carbon coating a commercial Si3N4 powder was carried out. The coated carbon reacts with the oxidation layer on the as-received Si3N4 powder to form nano sized SiC particles. Some of these SiC particles are located at the grain boundaries of the Si3N4.phases. Porosity was varied maintaining constant grain size by using pulse electric current sintering. It is concluded that the carbon coating improves the fracture toughness by reducing the pore influence on this property.

引用

页码：223 / 233

页数：11