Study on fabrication of highly textured ceramics by colloidal processing in a strong magnetic field

强磁场胶体加工制备高织构陶瓷的研究

• 批准号: 20350099
• 负责人: SAKKA Yoshio
• 金额: $ 11.98万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20350099/
• 关键词: セラミックス; 強磁場配向; コロイドプロセス; 粒子プロセス; 配向体; 焼結; MAX相セラミックス; 窒化ケイ素; 構造・機能材料; 材料加工・処理; ナノ材料

We intend to systematically clarify the requirement for fabricating highly textured ceramics through colloidal processing in a strong magnetic field. The following points were examined in details ; (1) highly dispersion of fine particles, (2) in-situ observation and theoretical consideration of particle alignment in a strong magnetic field, and (3) effect of particle shape and size on the degree and direction of orientation. We examined Al_2O_3 and TiO_2 as ceramics where the magnetic susceptibility of c-axis is larger than that of a,b-axis, and Si_3N_4 and HAP where the magnetic susceptibility of ab-axis is larger than that of c-axis. To obtain one-directional alignment the direction of applied magnetic field and/or rotation magnetic field is very important. Furthermore we succeeded to fabricate textured MAX phase ceramics such as Nb_4AlC_3 and Ti_3SiC_2. Especially textured Nb_4AlC_3 shows highest bending strength and fracture toughness among reported ones in ceramics.

我们打算系统地阐明在强磁场中通过胶体加工来制备高织构陶瓷的要求。详细讨论了以下几点：(1)细颗粒的高度分散性；(2)强磁场中颗粒取向的原位观察和理论考虑；(3)颗粒形状和尺寸对取向程度和方向的影响。我们研究了C轴磁化率大于a、b轴磁化率的Al_2O_3和TiO_2陶瓷，以及b轴磁化率大于c轴磁化率的Si_3N_4和HAP陶瓷。为了获得单向对准，外加磁场和/或旋转磁场的方向是非常重要的。此外，我们还成功地制备了Nb_4AlC_3和Ti_3SiC_2等织构MAX相陶瓷，尤其是织构Nb_4AlC_3具有最高的抗弯强度和断裂韧性。

项目成果

Texturing behavior in sintered reaction-bonded silicon nitride via strong magnetic field alignment

通过强磁场对准烧结反应结合氮化硅的织构行为

• 发表时间: 2008
• 期刊: J. Euro. Ceram. Soc. 28
• 作者: X. Zhu;T. S. Suzuki;T. Uchikoshi and Y. Sakka
• 通讯作者: T. Uchikoshi and Y. Sakka

Texture development of feeble magnetic ceramics by colloidal processing in high magnetic field

高磁场胶体加工弱磁性陶瓷的织构发展

• 发表时间: 2008
• 作者: 長谷川真澄;斎藤拓;伊藤員義;目義雄
• 通讯作者: 目義雄

SiC粒子プロセスの高度化によるSiC系セラミックスの微構造制御

通过先进的 SiC 颗粒工艺控制 SiC 基陶瓷的微观结构

• 发表时间: 2010
• 作者: 今村陽子;斎藤拓;鎗山晃多;土岸教通;兼子明;瀧宮和男;目義雄
• 通讯作者: 目義雄

Texture development of feeble magnetic ceramics by colloidal processing in strong magnetic field

强磁场胶体加工弱磁陶瓷的织构发展

• 发表时间: 2008
• 作者: Y. Sakka;T. S. Suzuki;T. Uchikoshi
• 通讯作者: T. Uchikoshi

Fabrication of innovative ceramics through advanced fine particle processing

通过先进的细颗粒加工制造创新陶瓷

• 发表时间: 2008
• 作者: Y. Sakka;T. Uchikoshi;T. S. Suzuki
• 通讯作者: T. S. Suzuki