Preferred Orientation of Porous Si3N4 Ceramics by Gel-Casting in a Longitudinal Rotating Magnetic Field

被引：3

作者：

Yang, Zhigang ^{[1
,2
,3
]}

Yu, Jianbo ^{[2
]}

Deng, Kang ^{[2
]}

Zhong, Yunbo ^{[2
]}

Ren, Zhongming ^{[2
]}

Fu, Hua ^{[1
]}

Wu, Hongya ^{[1
]}

Yu, Gang ^{[1
]}

机构：

[1] Shijiazhuang Tiedao Univ, Sch Mat Sci & Engn, Shijiazhuang 050043, Hebei, Peoples R China

[2] Shanghai Univ, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China

[3] Hebei Prov Key Lab Traff Engn Mat, Shijiazhuang 050043, Hebei, Peoples R China

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2018年 / 53卷 / 07期

基金：

中国国家自然科学基金;

关键词：

ceramics; gel-casting; longitudinal rotating magnetic field; sintering; TEXTURE DEVELOPMENT; FABRICATION; MICROSTRUCTURE; STRENGTH; GROWTH;

D O I：

10.1002/crat.201700147

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Preferred orientation of porous Si3N4 ceramics with -Si3N4 powders as raw material is obtained by gel-casting in a longitudinal rotating magnetic field and subsequent pressureless sintering. The effects of rotational speed on crystal orientation and properties of porous Si3N4 ceramics are analyzed. The results show that the c-axis of -Si3N4 grains tended to align along the direction of the rotation axis. The degree of orientation in the samples increases with the increasing rotational speed. The textured porous samples show higher bending strength than that of untextured porous samples owing to the integrative effect of the grain orientation and pores.

引用

页数：9

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