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烧结ndfeb
相关语句
  sintered nd-fe-b
     THEORETICAL AND EXPERIMENTAL STUDY ON COE-RCIVITY MECHANISM OF SINTERED Nd-Fe-B PERMANENT MAGNET ALLOYS
     烧结Nd-Fe-B永磁合金矫顽力机制的理论与实验研究
短句来源
     The coercivity dependence of sintered Nd-Fe-B permanent magnet alloys on ori-enting magnetic field was studied.
     从理论和实验上研究了烧结Nd-Fe-B永磁合金的矫顽力随取向磁场的变化规律。
短句来源
     A new method for evaluating the alignment degree of sintered Nd-Fe-B magnets quantitatively by X -ray diffraction measure-ments was Proposed, and the results were compared with Br/Js and (Br// -Br)/Br// measured by pulse magnetic field greater than 10T.
     提出了一种用普通X射线衍射谱定量测量烧结Nd-Fe-B磁体取向度的简单易行的新方法,并与用10~12T强脉冲磁场测量的Br/Js和(Br//→Br)/Br//值进行了比较。
短句来源
     We compared the value and the var- iation dependence of nucleation field with that of depinning field on the orientationof magnetic field. we come to the conclusion that depinning field is the main mech- anism controlling the coercivity of sintered Nd-Fe-B permanent magnet alloys.
     比较了成核场与退钉扎场的大小及其随磁场方向的变化,并得出结论:退钉扎场是决定烧结Nd-Fe-B磁体矫顽力的主要机制。
短句来源
  sintered nd-fe-b magnets
     A new method for evaluating the alignment degree of sintered Nd-Fe-B magnets quantitatively by X -ray diffraction measure-ments was Proposed, and the results were compared with Br/Js and (Br// -Br)/Br// measured by pulse magnetic field greater than 10T.
     提出了一种用普通X射线衍射谱定量测量烧结Nd-Fe-B磁体取向度的简单易行的新方法,并与用10~12T强脉冲磁场测量的Br/Js和(Br//→Br)/Br//值进行了比较。
短句来源
  “烧结nd-fe-b”译为未确定词的双语例句
     The effects of high - melting elements Ti together with low - melting elements Al or Cu on mi- crostructure and magnetic properties of Nd -Fe - B magnets were investigated .
     研究了在烧结Nd-Fe-B磁体晶间复合添加高熔点元素Ti和低熔点元素Al或 Cu对显微组织和磁性能的影响。
短句来源
     The studies of Nd-Fe-B magnetic ane distribution have been made by using statistic method.
     用数理统计方法研究了粉末烧结Nd-Fe-B永磁体磁性能的均匀性。
短句来源
     By comparing the effect of the combined addition with that of the single addition(Al, Cu or Ti) , it was found that the combined addition of high - melting and low - melting elements may be a better approach to modify the coercivity of Nd - Fe - B magnets.
     与单独添加的效果相比较发现,晶间复合添加高熔点与低熔点合金元素是一条提高烧 结Nd-Fe-B磁体矫顽力的有效途径。
短句来源
     The variation of oxygen content in every process of sintered Nd Fe B fabrication from raw materials,ingot,jaw crushing,roll crushing,ball milling,jet milling,compacting to sintering is studied.
     研究了烧结Nd-Fe-B磁体制作过程中从原材料、熔炼、粗破碎、气流磨、压型一直到烧结的各个环节中磁粉/体中氧含量的变化情况。
短句来源
  相似匹配句对
     Thermodynamic effects on the sintered Nd-Fe-B magnets
     烧结Nd-Fe-B中的热力学影响
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永磁体
短句来源
     Study on Alignment Degree of Sintered Nd-Fe-B Magnets
     烧结Nd-Fe-B取向度的研究
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
     Study of Milling Technology of Advanced Sintering Nd-Fe-B
     高档烧结Nd-Fe-B制粉工艺研究
短句来源
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  sintered nd-fe-b
Formation of a high-coercive state in sintered Nd-Fe-B-Ga magnets by thermocycling
      
Investigation of the Domain Structure of Sintered Nd-Fe-B Permanent Magnets by Bitter-pattern Method
      
The conventional Bitter-pattern technique and the colloid-scanning electron microscopy (colloid-SEM) method were used to study the domain structure of polycrystalline sintered Nd-Fe-B permanent magnets.
      
Investigation of the domain structure of sintered Nd-Fe-B permanent magnets by Bitter-pattern method
      
The conventional Bitter-pattern technique and the colloid-scanning electron microscopy (colloid-SEM) method were used to study the domain structure of polycrystalline sintered Nd-Fe-B permanent magnets.
      
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The boundary microstructure of the sintered alloy Nd_(15.5)Fe_(77)B_(7.5) hasbeen studied by TEM, ASE and SAED. It may distinguish the boundaries into 4types. The first three types remain the same during annealing, and the 4th changesits microstructure remarkably. The 4th type of boundary microstructure is composedof two different regions, i. e., the central Nd-rich phase and the epitaxial layer ofthe Nd_2Fe_(14)B grains. Owing to the atomic diffusion and other types of masstransport,magnetic hardening occurred...

The boundary microstructure of the sintered alloy Nd_(15.5)Fe_(77)B_(7.5) hasbeen studied by TEM, ASE and SAED. It may distinguish the boundaries into 4types. The first three types remain the same during annealing, and the 4th changesits microstructure remarkably. The 4th type of boundary microstructure is composedof two different regions, i. e., the central Nd-rich phase and the epitaxial layer ofthe Nd_2Fe_(14)B grains. Owing to the atomic diffusion and other types of masstransport,magnetic hardening occurred in the epitaxial layers, thus the coercivity of the alloywill be improved.

用TEM观察了烧结NdFeB永磁合金的内边界显微结构,发现该合金存在4种类型的边界。回火前后前三类边界的形貌没有变化,而第4类边界的显微结构发生了显著的变化。用SAED和AES分析了第4类边界的成分与结构,该边界由两个区域组成,即富Nd相区和Nd_2Fe_(14)B晶粒的外延层。回火时,由于原子的扩散和物质迁移,Nd_2Fe_(14)B晶粒的外延层发生了磁硬化,因而合金的矫顽力得到提高。

Based on the observations of TEM, a microstructural model of Sintered NdFeB magnets has been found. The coercivity of the model was calcu-latedbased on micromagnetic theory and the coercivity of both Nd2Fe14B grains and sintered NdFeB magnets were analysed and discussed. A magnetic hardering theory of epitaxial layer of Nd2Fe14B grain and the way of increasing coercivity of sintered NdFeB magnets were put forward.

根据TEM观察,建立了三元烧结NdFeB系永磁体的显微结构模型。运用微磁学理论对矫顽力模型作了计算,并讨论了Nd_2Fe_(14)B晶粒和NdFeB系永磁体的矫顽力。提出了烧结NdFeB系永磁体Nd_2Fe_(14)B晶粒的外延壳磁硬化理论和提高其矫顽力的途径。

The oxidation of sintered NdFeB magnets in humid atmosphere at

用透射电镜、Auger能谱,X射线和Mossbauer等方法研究了烧结NdFeB永磁材料在90℃潮湿空气中的氧化行为。结果表明,黑色氧化组织先在富Nd晶界相处形成。沿晶界深入和扩展进入基体相Nd_2Fe_(14)B晶粒,形成表面氧化层。黑色组织内富O和Nd而贫Fe。经500h氧化后,粉末组成仍以Nd_2Fe_(14)B粒子为主,余为Fe_3O_4,Nd_2O_3和少量a-Fe_2O_3,立方Fe_2O_3。经氧化的Nd_2Fe_(14)B相四方晶格内Fe原子分布发生变化,c晶位Fe原子大部分逸失,这是氧化导致材料磁化强度降低的重要原因。

 
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