Orientation-dependent properties of silicon nitride with aligned reinforcing grains

被引：23

作者：

Park, DS ^{[1
]}

Choi, MJ ^{[1
]}

Roh, TW ^{[1
]}

Kim, HD ^{[1
]}

Han, BD ^{[1
]}

机构：

[1] Korea Inst Machinery & Mat, Ceram Mat Grp, Chang Won City, Kyong Nam, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 01期

关键词：

D O I：

10.1557/JMR.2000.0022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Silicon nitride with the aligned reinforcing grains was prepared by tape casting with addition of the silicon nitride whiskers and gas-pressure sintering at 2148 K. The microstructure and the mechanical properties of the sintered sample, including the fracture toughness and the three-point flexural strength, were highly anisotropic. Both the fracture toughness and the flexural strength were the highest when the crack-propagation direction was normal to the alignment direction. This result was interpreted from the laminate composite materials' point of view. Although the large elongated grains were as long as 44.4 +/- 12 mu m and as wide as 5.1 +/- 0.67 mu m, they were not the fracture origins.

引用

页码：130 / 135

页数：6