Innovation in Electromagnetic Science of Materials and Its Application to Practical Materials Processing

材料电磁科学创新及其在实际材料加工中的应用

• 批准号: 19106013
• 负责人: TSUREKAWA Sadahiro
• 金额: $ 67.56万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (S)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19106013/
• 关键词: 極限環境場プロセス; 磁場; 粒界; 組織制御; 磁気モーメント; 第一原理計算; 相変態; 変態エントロピー; DSC; パーライト; 粒界偏析; 時効硬化; 時効析出; チタン; ω相; 交流磁場; 拡散; 表面拡散; 高炭素鋼; セメンタイト; 再結晶; 粒成長; EELS; 粒界エネルギー; 粒界移動; 磁性

The motivation of this study was to reveal the origin of the magnetic field effect on the metallurgical phenomena related to development of microstructure in materials. Of particular importance were findings that the diffusivity of carbon in iron was retarded under a uniform magnetic field, whereas it was enhanced under a magnetic field gradient. In addition, we found the enhancement of local magnetic moment near the grain boundaries for the first time using the TEM/EELS technique. Furthermore, the results that will contribute to development of electromagnetic processing of materials(EPM) were obtained : the effect of magnetic field on grain boundary energy and on thermodynamics factors related to phase transformation, for example.

本研究的动机是揭示磁场对材料中与微观结构发展相关的冶金现象的影响的起源。特别重要的是，发现碳在铁中的扩散率在均匀磁场下被延迟，而在磁场梯度下被增强。此外，我们还首次利用TEM/EELS技术发现了晶界附近局部磁矩的增强。此外，还获得了有助于材料电磁加工发展的结果：例如，磁场对晶界能和与相变有关的热力学因素的影响。

项目成果

Grain Boundary Engineering of Austenitic Stainless Steels

奥氏体不锈钢的晶界工程

• 发表时间: 2009
• 期刊: JSPS
• 作者: H. Kokawa;M. Michiuchi;M. Shimada;Y. S. Sato;Z. J. Wang
• 通讯作者: Z. J. Wang

Impact of a magnetic field on grain boundary energy in 99. 99% iron and iron-tin alloy

冲击%20of%20a%20Magnetic%20field%20on%20grain%20boundary%20energy%20in%2099.%2099%%20iron%20and%20iron-tin%20alloy

• 发表时间: 2009
• 期刊: Review on Advanced Materials Science 21(印刷中)
• 作者: Ryohei Sumi

Microstructure Analysis of Nd-Fe-B Sintered Magnets Improved by Tb-metal Vapor Sorption

金属铽气相吸附改进 Nd-Fe-B 烧结磁体的微观结构分析

• 发表时间: 2009
• 期刊: J. Microscopy 236
• 作者: N.Watanabe;M.Itakura;et al.
• 通讯作者: et al.

Transmission Electron Microscopy Studies of Twins in Ni-Mn-Ga Alloy

Ni-Mn-Ga合金中孪晶的透射电子显微镜研究

• 发表时间: 2008
• 作者: 藤田麻哉;藤枝俊;深道和明;M. Nishida
• 通讯作者: M. Nishida

Grain Boundary Control and Characterization in Ti-Ni Alloys

钛镍合金的晶界控制和表征

• 发表时间: 2007
• 作者: Wong;HL. and Shimamoto;K.;辻内翔;白木知也;渡辺哲史・宮本裕司・鈴木祥之;M.Nishida
• 通讯作者: M.Nishida