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ndfeb磁体
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  nd-fe-b magnets
     THE DEVELOPMENT AND APPLICATION OF KEY MANUFACTURE TECHNIQUE FOR HIGH-PERFORMANCE SINTERED Nd-Fe-B MAGNETS
     高性能烧结Nd—Fe—B磁体关键制造技术的开发与应用
短句来源
     Nd-Fe-B magnets, considered as the third generation of rare earth permanent magnets:is a promising material. However, the successful application of Nd-Fe-B magnets depents on the maintenance of high magnetic performances at 120 -150掳C and its lowering cost.
     指出第三代稀土永磁材料Nd—Fe—B磁体有发展前途,但其成功的应用取决于在120~150℃能否保持高的磁性能并降低成本。
短句来源
     By optimizing the alloy compositions and improving the alloy ingot technique,powder-preparing technique,magnetically-aligning technique and sintering technique,N45H sintered Nd-Fe-B magnets have been successfully mass-produced from common commercially-available Nd,Dy,Tb,Fe,Nb,Cu,Al metals and B-Fe master alloy.
     通过优化合金成分设计和改进合金铸锭技术、合金粉末制备技术、磁场取向成型技术以及烧结技术 ,应用全部国产设备与国内通用的工业生产烧结 Nd— Fe—B永磁的原材料 ,避免使用镓等稀有贵重金属元素 ,实现了 N4 5 H烧结 Nd— Fe—B磁体的工业化生产。
短句来源
     In view of the above,the development and application situations of some key manufacture techniques for high performance sintered Nd-Fe-B magnets were summarized in recent years.
     据此,简要综述了近年来高性能烧结Nd—Fe—B磁体关键制造技术的开发与应用状况。
短句来源
     Associated with the massproduction of sintered Nd-Fe-B magnets currently in China,an investigation is presented in this papers of the impact of compact density on microstructure and magnetic properties of sintered Nd-Fe-B magnets.
     结合国内烧结 Nd— Fe— B磁体工业生产过程 ,研究了压制成型时生坯密度变化对烧结 Nd—Fe— B磁体致密化程度、显微组织、取向度与磁性能的影响。
短句来源
  “nd—fe—b磁体”译为未确定词的双语例句
     EFFECT OF COMPACT DENSITY ON MICROSTRUCTURE AND MAGNETIC PROPERTIES OF SINTERED Nd—Fe—B MAGNETS
     生坯密度对烧结Nd—Fe—B磁体结构与性能的影响
短句来源
  相似匹配句对
     THERMAL ANALYSIS OF Nd-Fe-B MAGNET
     Nd-Fe-B磁体热分析
短句来源
     STUDY OF NEW SUBSTITUTED Nd-B-Fe MAGNETS
     添加替代元素的Nd-B-Fe磁体
短句来源
     Microstructural study on Nd-Fe-B permanent magnets prepared by hot isostatic pressing sintering
     热等静压烧结Nd-Fe-B磁体
短句来源
     Temperature Character of Nd-Fe-B Permanent-Magnet
     Nd-Fe-B磁体的温度特性
短句来源
     MAGNETIZATION BEHAVIOR IN SINTERED Nd-Fe-B MAGNETS
     Nd-Fe-B烧结磁体的磁化行为
短句来源
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  nd-fe-b magnets
Electroreductive polymerization of trans-[RuCl2(vpy)4] on Nd-Fe-B magnets: electrochemical impedance spectroscopy interpretation
      
The electropolymerization of trans-[RuCl2(vpy)4] (vpy=4-vinylpyridine) monomer on Nd-Fe-B magnets was studied by electrochemical impedance spectroscopy (EIS).
      
Crystallographic and magnetic alignment in die-upset Nd-Fe-B magnets
      
The corrosion behavior of Nd-Fe-B magnets varies depending on the alloy composition, surface condition, and corrosion environment and temperature.
      
Application of neodymium-iron-boron (Nd-Fe-B) magnets
      
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The recent development of the rare earth permanent magnets, especially the Nd-Fe-B magnets is reviewed. The structure and problem of the rare earth magnet industries of both the world and China are discussed as well. The importance and the applications of vacuum technology is the rare earth magnet industry has been pointed out.

本文综述了稀土永磁,特别是NdFeB磁体近年的发展及其趋势,着重分析了全球与中国稀土永磁产业的结构特点和问题。指出了真空技术对稀土永磁产业的重要性,以及真空技术在稀土永磁产业未来发展中的作用。

The importance of microstructure in determing the magnetic properties, especially the coercivity, of the sintered NdFeB magnets is discussed. The microstructure of sintered ternary NdFeB magnets include the hard magnetic Nd_2Fe_(14)B φ-phase, the Nd_(1+ε)Fe_4B_4 η-phase, Nd-rich phase and a certain amounts of other minor phases. The φ-phase represents a volume fraction of 85%-90% in commercial magnets and is responsible for the magnetic properties of the magnets. The effect of η-phase on the coercivity iHc is...

The importance of microstructure in determing the magnetic properties, especially the coercivity, of the sintered NdFeB magnets is discussed. The microstructure of sintered ternary NdFeB magnets include the hard magnetic Nd_2Fe_(14)B φ-phase, the Nd_(1+ε)Fe_4B_4 η-phase, Nd-rich phase and a certain amounts of other minor phases. The φ-phase represents a volume fraction of 85%-90% in commercial magnets and is responsible for the magnetic properties of the magnets. The effect of η-phase on the coercivity iHc is unfavorable, but the existence of a small amount of η-phase can ensure the formation of the φ-phase. The Nd-rich phase is important for the iHc of the magnets, and a thin Nd rich layer between the hard magnetic φ-grains is desirable to increase the expansion field of reversed domains and to decrease the coupling field between neighbouring grains. The other minor phases such as Nd_2O_3, Nd_2Fe_(17), free Fe make the formation of the reversed domain easy and decrease the coercivity, thus these minor phases should be avoided as far as possible.

纯三元NdFeB磁体的显微组织主要由Nd_2Fe_(14)B硬磁ψ相,富硼Nd_(1+ε)Fe_4B_4η相,富Nd相及少量杂相组成。其中占磁体体积百分比85%~90%的ψ相是非内禀磁特性的主要贡献者;占磁体体积5%的η相对iHc无益,但少许η相仍有利于ψ相形成,富Nd相对ψ相具包裹作用,有助于提高矫顽力;杂相使反磁化畴易于形成,应尽量少。同时,讨论了各显微组织的形成及作用机理。

Combinning with the internal and external development of Nd-Fe-B permanent magnetic materials,we designed and manufactured a VRQ-10T Vacuum Rapidly Quench Equipment with the melt spinning extraction method, and chose the technologic parameters rationally in this paper; then we got the thin NdFeB ribbons (20-50 um thickness) and produced the NdFeB bonded magnets with the maximum energy product (BH)max=51.7kJ/m3 .By the design and experiment, we have introduced the technical and structural characteristics of...

Combinning with the internal and external development of Nd-Fe-B permanent magnetic materials,we designed and manufactured a VRQ-10T Vacuum Rapidly Quench Equipment with the melt spinning extraction method, and chose the technologic parameters rationally in this paper; then we got the thin NdFeB ribbons (20-50 um thickness) and produced the NdFeB bonded magnets with the maximum energy product (BH)max=51.7kJ/m3 .By the design and experiment, we have introduced the technical and structural characteristics of the equipment and according to the demagnetization curves and x-ray diffraction patterns, we have analysed the major technologic parameters for producing the microstructure NdFeB ribbons and NdFeB bonded magnets. At last, we got the conclusions that the linear velocity of the wheel affects the magnetic properties mainly and microstructure magnets can get the best magnetic properties.

本文结合国内外钕铁硼永磁材料的开发应用状况,采用熔体旋转萃取法,设计、制造并调试完成了一台 VRQ-10T型真空快淬设备,合理地选择了工艺参数,得到了厚为 20~50μm的 NdFeB薄带,制备了最大磁能积(BH)max=51.7kJ/m3的NdFeB粘结磁体.本文介绍了该设备各部件的结构特点,并通过对退磁曲线的测试和对X射线衍射图样的观察,分析了影响微晶 NdFeB成带情况及粘结 NdFeB磁体性能的各种因素。最后,我们得到结论.转轮表面线速度是影响磁性能的主要因素,微晶结构的NdFeB粘结磁体性能最佳.

 
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