Porous silicon nitride from starting powder with addition of coarse grain

被引：0

作者：

Ishizaki, M

Kondo, N

Ando, M

Ohji, T

机构：

[1] Fine Ceram Res Assoc, Synergy Ceram Res Lab, Moriyama Ku, Nagoya, Aichi 4638687, Japan

[2] Agcy Ind Sci & Technol, Synergy Mat Res Ctr, Moriyama Ku, Nagoya, Aichi 4638687, Japan

来源：

SILICATES INDUSTRIELS | 2004年 / 69卷 / 7-8期

关键词：

silicon nitride; porous; coarse grain; mechanical properties;

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：

Porous silicon nitride was sintered from mixture of fine and coarse powders, of which the grain sizes were 0.1 and 10 mum, respectively. The amount of the coarse powder was varied from 0 to 30%, which resulted porosity up to 13%. The strength and elastic modulus decreased with porosity, whereas the fracture toughness was increased. The fracture strain remained almost constant with the porosity, whereas the estimated critical flaw size with the porosity of 10% was 3 times that of the dense body, suggesting that the porosity enhanced the defect tolerance of the material.

引用

页码：195 / 198

页数：4