位置：成果数据库 > 期刊 > 期刊详情页
各向异性热压稀土永磁体的热变形机制及微磁结构研究
  • ISSN号：1009-1742
  • 期刊名称：中国工程科学
  • 时间：2011.10.10
  • 页码：4-12+27
  • 分类：TM273[电气工程—电工理论与新技术;一般工业技术—材料科学与工程]
  • 作者机构：[1]钢铁研究总院功能材料研究所,北京100081
  • 相关基金：国家自然科学基金重点项目（50931001）; 国家重点基础研究发展计划973项目（2010CB934601）; 国家高技术研究发展计划重大项目（2010AA03A401）
  • 相关项目：各向异性双相复合纳米晶永磁材料
作者： 李卫|朱明刚|
关键词： 纳米晶Nd-Fe-B辐向环, 热压-热变形, 各向异性, 微磁结构, nanoscale Nd-Fe-B magnets, hot press-hot deformation, anisotropy, magnetic domains
中文摘要：

重点研究制备工艺对各向异性热压稀土永磁体性能的影响,探讨了热压永磁体的热变形机理和数学描述模型,并尝试从微磁结构的角度研究各向异性纳米晶Nd-Fe-B磁体,揭示纳米晶粒之间的静磁和交换耦合相互作用、磁化和反磁化、热退磁等微观机制。获得了最佳磁性能为：Hcj=1 157 kA/m,Br=1.465 T,（BH）max=426 kJ/m3纳米晶Nd-Fe-B磁体。

英文摘要：

In this paper,high performance of anisotropic de-upset nanoscale Nd-Fe-B magnets is obtained： intrinsic coercivity Hcj=1 157 kA/m,remanence Br=1.465 T and maximum energy product（BH）max=426 kJ/m3.The fabrication procedure dependence,deformation mechanism and magnetic domains of these materials are discussed.It is found that the strain activation energy of the die-upset Nd-Fe-B magnets is about 380 kJ/mol based on the Arrhenius Model.The interaction domains are the typical characteristics of the magnetic structures of the magnets.And these domains play an important role in the coercivity mechanism and the corresponding maximum application temperature for the die-upset Nd-Fe-B magnets.

同期刊论文项目
　新型高性能纳米复合永磁材料
期刊论文 9
各向异性双相复合纳米晶永磁材料
期刊论文 38 会议论文 8 专利 10
同项目期刊论文
Nd-Dy-Fe-Co-B磁体的环境加速腐蚀行为研究
Enhancement of coercivity for melt-spun SmCo(7-x)Tax ribbons with Ta addition
Microstructure, magnetic and electrical properties of the composite magnets of Nd–Fe–B p
Preparation and magnetic properties of hard-magnetic (CoPt)/soft-magnetic (FeCo) composite nanocable
Quasi-periodic layer structure of die-upset NdFeB magnets
纳米Al_2O_3掺杂对NdFeB磁体磁性能和电阻率的影响
High performance anisotropic NdFeB magnets prepared by dual-alloy die-upsetting
Effects of Ga addition on structural and magnetic properties of nanocomposite Nd-Fe-B-Ti-C thick rib
Magnetic properties and microstructure of Nd-Fe-B sintered magnets with DyHx addition
Mechanism Analysis of Coercivity Enhancement of Hot Deformed Nd-Fe-B Magnets by Diffusion
Effect of Temperature Gradient on the Microstructure of the Rapidly Solidi?ed Nd–Fe–B Strips
Nd-Fe-B永磁合金速凝带取向织构的形成机理及数学模型
Microstructure and magnetic properties of sintered Nd–Fe–B magnets with high hydrogen co
Effect of Heat Treatment on Microstructure and Thermal Stability of Nd–Fe–B Sintered Mag
Enhanced texture in die-upset nanocomposite magnets by Nd-Cu grain boundary diffusion
Dysprosium Diffusion Behavior and Microstructure Modification in Sintered Nd-Fe-B Magnets via Dual-A
Microstructures and magnetic properties of Ce32.15Co49.36Cu9.84Fe9.65 magnet sintering at different
Microstructure and Properties of Die-Upset Nd-Fe-B/Dy O Composite Magnets
Investigation on microstructure and magnetic properties of Sm2Co17 magnets aged at high temperature
Magnetic Interaction in FeCo Alloy Nanotube Array
A study of hot deformation in nanocrystalline Nd-Fe-B backward extruded rings
Pr_2Fe_(14)(C,B)/α-(Fe,Co)型纳米晶复合磁体的结构与磁性
A new approach to fabricate Nd2Fe14B/α-Fe nanocomposite precursors by selective removal of Nd
Origins of axial inhomogeneity of magnetic performance in hot deformed Nd-Fe-B ring magnets
烧结钕铁硼磁体边界相的调控技术机制
辊速和喷射压力对磁粉及热流变磁体的影响
Hot deformation in nanocrystalline Nd-Fe-B backward extruded rings
Controlled synthesis and multifunctional properties of FePt-Au heterostructures
Chemical synthesis of magnetic nanocrystals: Recent progress
烧结钕铁硼磁体边界相的调控技术机制
单核Gd化合物的场依赖磁弛豫和磁热效应研究
Sm2Co17永磁材料力学各向异性机理分析
The magnetization reversal behaviour for SmCo6.8Zr0.2 and SmCo6.8Zr0.2a-（Fe,Co） nanocrystalline magnets at low temperature
高性能Nd-Fe-B复合永磁材料微磁结构与矫顽力机制
Effect of hydriding degree on the microstructure and magnetic properties of sintered NdFeB magnets
Electrodeposition and magnetic properties of FeCo alloy films
Synthesis of FePt Nanocubes Using Mo(Co)6 as a Reducing Agent and Their Magnetic Properties
Investigation on microstructure, texture, and magnetic properties of hot deformed Nd-Fe-B ring magne
Twinning structure in Sm(Co,Fe,Cu,Zr)z permanent magnet
Magnetic microstructures of a high coercivity Nd-Fe-B sintered magnet in remanent and incomplete the
Pr_2Fe_(14)(C,B)/α-(Fe,Co)型纳米晶复合磁体的结构与磁性
Nanomagnetism： Principles, nanostructures, and biomedical applications
稀土永磁纳米材料的化学法制备及其磁学性能
期刊信息
  • 《中国工程科学》
  • 北大核心期刊（2011版）
  • 主管单位:中国工程院
  • 主办单位:中国工程院 高等教育出版社有限公司
  • 主编：
  • 地址：北京市朝阳区惠新东街4号富盛大厦12层
  • 邮编：100029
  • 邮箱：
  • 电话：010-58582511
  • 国际标准刊号：ISSN：1009-1742
  • 国内统一刊号：ISSN：11-4421/G3
  • 邮发代号:2-859
  • 获奖情况:
  • 国内外数据库收录:
  • 中国中国科技核心期刊,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:21296