Texturing of Si3N4 ceramics via strong magnetic field alignment

被引：11

作者：

Zhu, Xinwen ^{[1
]}

Suzuki, Tohru S. ^{[1
]}

Uchikoshi, Tetsuo ^{[1
]}

Sakka, Yoshio ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

HIGH-PERFORMANCE CERAMICS V, PTS 1 AND 2 | 2008年 / 368-372卷

关键词：

silicon nitride; ceramics; texture; seeding; slip casting; strong magnetic field;

D O I：

10.4028/www.scientific.net/KEM.368-372.871

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：

This paper reports the texture development in Si3N4 by strong magnetic field alignment (SMFA), using slip casting of alpha-Si3N4 raw powder (SN-E10) and pressureless sintering. The texture of beta-Si3N4 in the green and sintered bodies was characterized by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The a, b-axis and c-axis aligned beta-Si3N4 has been obtained by the static and rotating magnetic field of 12 T, respectively. The beta-seed addition and prolonged sintering both enhance the texture, but the former is more efficient. This work suggests an efficient SMFA strategy of producing highly textured beta-Si3N4, particularly the unidirectionally c-axis aligned beta-Si3N4 by seeding the alpha-raw powder using the less-agglomerated beta-phase particles.

引用

页码：871 / 874

页数：4

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