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nddyfeb
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  nd-dy-fe-b
     So the coercivity of Nd-Dy-Fe-B-Sn is controlled by strong pinning of domain wall, but Nd-Dy-Fe-B by localized weak pinning.
     而Nd-Dy-Fe-B合金的实验结果,与强钉扎模型计算结果不相符,进一步分析表明,Nd-Dy-Fe-B合金的磁化反转过程由局域化弱钉扎控制。
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  相似匹配句对
     Effect of Hydrogen on the Process of Nd-Dy-Fe-B Magnets
     氢对Nd-Dy-Fe-B磁体制作过程的影响
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     Effects of hydrogen on the oxidation of coarse Nd-Dy-Fe-B powder
     氢对Nd-Dy-Fe-B合金粗粉氧化的影响
短句来源
     THERMAL ANALYSIS OF Nd-Fe-B MAGNET
     Nd-Fe-B磁体热分析
短句来源
     Fe-N alloys were prepared by means of mechanical milling and high pressure technologies.
     Fe(N)。
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     The distribution of Fe-Mn oxide-bound metals is consistent with the clay particle.
     Fe-M(?)
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The developing processes of microstructure of NdDyFeB green compacts in the different heating stages have been analysed in a thermodynamic principle, and some kinetic phenomena such as particle rearrangement, solution-precipitation, formation of solid skeleton and ploygonization have also been researched. It is shown that the density of magnets varies with the change of microsturcture, leading to the change of magnetic properties. The presence of Nd-rich liquid phase, the elmination of gas absorbed film...

The developing processes of microstructure of NdDyFeB green compacts in the different heating stages have been analysed in a thermodynamic principle, and some kinetic phenomena such as particle rearrangement, solution-precipitation, formation of solid skeleton and ploygonization have also been researched. It is shown that the density of magnets varies with the change of microsturcture, leading to the change of magnetic properties. The presence of Nd-rich liquid phase, the elmination of gas absorbed film on the surface of grains of different sizes are helpful for densification of magnets. The grain coarsing, polygnonization of grain shape and pore migration are keys to obtain the final densification.

从热力学的角度分析了NdDyFeB磁体加热各阶段中微观组织的转变过程,研究了这个过程中所发生的质点重排、固溶沉淀、固相骨架形成、形态多边化等动力学现象。结果表明,显微结构的变化,将引起密度的变化,进而导致磁性能的变化。富Nd液相的存在,晶粒表面气体吸附膜的排除,晶粒间存在的化学位差均有利于磁体向致密化方向发展。晶粒粗化,形态多边化和孔洞排出是获得最终致密度的关键。

The evolution of microstructure of sintered NdDyFeB magnets in heating process was studied, and therelation between development of microstructure and magnetic properties was explained. The investigationsshow that the establishment of magnetic properties relate closely to the development of densification. Themagnetic properties vary with the increase of density till the magnets reach the ultimate magnetic propertiesand final density of the sintered state.

RelationbetweenDevelopmentofMicrostructureandMagneticPropertiesofSinteredNdDyFeBMagnetsTangWei;FuHengzhi;ZouGuangrong;ShiZhen...

One of the very urgent tasks in the present development of Chinese elctronics industry is to improve the propertics of sintered NdDyFeB magnets. The dcnsification process in sintering influences greatly the microstructure of magnets and thus their final magnetic properties.The results show that there are three subproccsscs in liquid phase sintering of NdDyFeB magnets:(1)particle rcarrangcmcnt, (2)solution-precipitation and (3)formation of solid skeleton. Subprocess (2)affects the development of dcnsification...

One of the very urgent tasks in the present development of Chinese elctronics industry is to improve the propertics of sintered NdDyFeB magnets. The dcnsification process in sintering influences greatly the microstructure of magnets and thus their final magnetic properties.The results show that there are three subproccsscs in liquid phase sintering of NdDyFeB magnets:(1)particle rcarrangcmcnt, (2)solution-precipitation and (3)formation of solid skeleton. Subprocess (2)affects the development of dcnsification most.The authors find that dcnsification of magnets can be improved in three ways:(1) The Nd-rich liquid phase increases with increasing temperature and is increasingly beneficial to dcnsification.(2) The elimination of vapour film on surface of grains under vacuum condition enhances the wcttability of solid and thus dcnsification.(3) Even during subproccss of formation of solid skeleton, densification can be improved through coarsening of grains, polygonization of morphology and migration of pores.

研究了NdDyFeB毛坯在加热及随后的烧结过程中致密度的发展规律,分析了这个过程所发生的三个重要的动力学阶段:质点重排、固溶一沉淀和固相框架的形成及其影响因素以及富钕相、晶粒尺度的变化对致密化的影响、讨论了微观结构中毛坯由聚集的粉粒向磁性相组织的转变过程。由此得到,致密度的发展同微观结构的变化密切相关。

 
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