Mlaostructuecontno llnighmlicf ; mfionand crystal gowthunderanagieticteld

结构紧凑；

• 批准号: 18360369
• 负责人: YASUDA Hideyuki
• 金额: $ 10.98万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360369/
• 关键词: Magneto-science; solidification; crystal growth; crystal alignment; Orderging; High magnetic field; Magnetocrystalline anisotropy; Coarsening; 磁気効果; 粒子配列; 配向組織

In this research project, we focused on microstructure evolution (regular structure, crystallographically aligned structure and so on) during solidification and coarsening.(1) Formation of the regular structure by the magnetic effect on the solidifying frotSuppression of the local melt flow (the micro-MHD effect) becomes apparent under a high magnetic field. For the Al-In monotectic alloys, the regular structure in which the rods are regularly aligned was formed. From viewpoints of the micro-MHD and the dipole-dipole interaction, the formation of the regular structure was discussed.(2) Formation of the regular structure by the dipole -dipole interaction in fluidThe dipole-dipole interaction enhanced the regularity of the Ti02 spherical particles with a diameter from sub micro meter to several micrometer after the sedimentation. The results showed that the magnetic effect could be used for fabricating crystals which consisted of the fine particles (oxide particles).(3) Formation of the aligned structure during solid state transformationThe phase filed model that includes the principles of the thermodynamics was introduced to analyze the formation of the crystallographically aligned structure during coarsening process. The calculation showed that the magnetocrystalline anisotropy energy could contribute to the formation of the aligned structure in some conditions. Inhomogeneity in grain size and distance between grains degraded the degree of the alignment.In addition, the three dimensionally aligned structure was fabricated for the intermetallic compound with the lower crystal symmetry.

在该研究项目中，我们专注于在凝固和变高过程中微观结构的演化（规则结构，晶体学对齐的结构等）。（1）在高磁场下，通过磁对局部熔体流动（微型MHD效应）的固化效果的磁效应来形成规则结构。对于Al-I-IN单型合金，形成了定期对齐杆的常规结构。从微-MHD和偶极 - 偶极相互作用的角度来看，讨论了常规结构的形成。（2）在流体中通过偶极 - 偶极相互作用形成常规结构，从而增强了偶极 - 偶极 - 偶极相互作用，从而增强了TI02球形粒子的规则性，从而使Sub Micro仪表与接下来的微米进行了数量表的二维数。结果表明，磁效应可用于制造由细颗粒（氧化物颗粒）组成的晶体。（3）在固态转化过程中形成对齐结构的形成相位的结构，引入了包括热力学原理的相位归档模型，以分析在固定过程中结晶结构的形成。计算表明，磁晶各向异性能量在某些条件下可能有助于对齐结构的形成。晶粒尺寸的不均匀性和谷物之间的距离降低了对齐的程度。此外，为金属间化合物制造了三维对齐结构，并具有较低的晶体对称性。

项目成果

Fabrication of Porous Aluminum and Copper Media by using Monotectic Solidification under a Magnetic Field

磁场下使用偏晶凝固法制备多孔铝和铜介质

• 发表时间: 2006
• 期刊: Mater. Sci. Forum 512
• 作者: H.;LYasuda;I.;Ohnaka;B.;KDhindaw;S.;Fujimoto;N.;Takezawa;T.;Tamayama;A.;Tsuchiyama;T.;Nakano;K.;CUesugi
• 通讯作者: CUesugi

Development of electromagnetic levitation using static and alternating Magnetif field (Japanese)

利用静态和交变磁场开发电磁悬浮（日语）

• 发表时间: 2006
• 期刊: Materila 45
• 作者: H.;Yasuda
• 通讯作者: Yasuda

Application of time -resolved X-ray imaging to the solidification behavior

时间分辨X射线成像在凝固行为中的应用

• 发表时间: 2007
• 作者: H.;Yasuda
• 通讯作者: Yasuda

Effect of the electromagnetic forces on solidification

电磁力对凝固的影响

• 发表时间: 2007
• 期刊: Handbook for experimental mechanics Asakum Shoten
• 作者: H.;Yasuda
• 通讯作者: Yasuda

時間分解X線イメージングによる結晶成長過程の観察,

使用时间分辨 X 射线成像观察晶体生长过程，

• 发表时间: 2007
• 期刊: まてりあ 46
• 作者: 安田秀幸;山本洋介;柳楽知也;吉矢真人;杉山明;大中逸雄;上杉健太郎;梅谷啓二
• 通讯作者: 梅谷啓二