Fabrication of textured Si3N4 ceramics with β-Si3N4 powders as raw material by gel-casting under strong magnetic field

被引：18

作者：

Yang, Zhigang ^{[1
]}

Yu, Jianbo ^{[1
]}

Deng, Kang ^{[1
]}

Lan, Liang ^{[1
]}

Wang, Huan ^{[1
]}

Ren, Zhongming ^{[1
]}

Wang, Qiuliang ^{[2
]}

Dai, Yinming ^{[2
]}

Wang, Hui ^{[2
]}

机构：

[1] Shanghai Univ, Shanghai Key Lab Modern Met & Mat Proc, Shanghai 200072, Peoples R China

[2] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 135卷

关键词：

Ceramics; Gel-casting; Sintering; Strong magnetic field; SILICON-NITRIDE; ALIGNMENT;

D O I：

10.1016/j.matlet.2014.07.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The textured Si3N4 ceramics with beta-Si3N4 powders as raw material were fabricated by gel-casting under a strong magnetic field of 6 T and subsequent pressureless sintering. The results show that the a or b-axis of beta-Si3N4 crystal is oriented parallel to the direction of magnetic field. The degree of texture in the green body reaches 0.72. With the increase of sintering temperature, the degree of texture in the sample increases from 0.74 at 1700 degrees C to 0.81 at 1800 degrees C. The bending strength of the Si3N4 ceramic depends on the orientation of grains. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：218 / 221

页数：4

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