您的位置: 专家智库 > >

国家自然科学基金(51171049)

作品数:4 被引量:21H指数:4
相关作者:李安华朱明刚王景代李岩峰冯海波更多>>
相关机构:钢铁研究总院江西理工大学更多>>
发文基金:国家自然科学基金国家高技术研究发展计划国家重点基础研究发展计划更多>>
相关领域:一般工业技术电气工程冶金工程理学更多>>

文献类型

  • 4篇中文期刊文章

领域

  • 2篇电气工程
  • 2篇一般工业技术
  • 1篇冶金工程
  • 1篇理学

主题

  • 2篇磁体
  • 2篇NDFEB
  • 1篇性能及微观结...
  • 1篇盐雾
  • 1篇盐雾腐蚀
  • 1篇烧结ND-F...
  • 1篇剩磁
  • 1篇热变形
  • 1篇耐蚀
  • 1篇耐蚀性
  • 1篇矫顽力
  • 1篇NDFEB磁...
  • 1篇RARE_E...
  • 1篇RELATI...
  • 1篇SIZE
  • 1篇
  • 1篇ANISOT...
  • 1篇DEFORM...
  • 1篇MAGNET
  • 1篇DY

机构

  • 2篇钢铁研究总院
  • 1篇江西理工大学

作者

  • 2篇朱明刚
  • 2篇李安华
  • 1篇李卫
  • 1篇钟明龙
  • 1篇黄书林
  • 1篇冯海波
  • 1篇李岩峰
  • 1篇王景代
  • 1篇李家节
  • 1篇仲洁

传媒

  • 1篇稀土
  • 1篇中国稀土学报
  • 1篇Journa...
  • 1篇Rare M...

年份

  • 2篇2015
  • 1篇2014
  • 1篇2013
4 条 记 录,以下是 1-4
排序方式:
双主相合金法添加镝对烧结Nd-Fe-B磁性能及微观结构的影响被引量:7
2013年
提出了一种制备高矫顽力、高剩磁烧结Nd-Fe-B磁体的方法——双主相合金法,利用这种方法制备的磁体中同时存在Nd2Fe14B和(Nd,Dy)2Fe14B两种主相。能谱分析表明:这种方法可以调控主相成分,制备的磁体易于实现全致密化并且剩磁较高,综合磁性能较好。利用双主相合金法制备磁体的剩磁和磁能积优于双合金法。
王景代冯海波李安华李岩峰黄书林朱明刚李卫
关键词:矫顽力剩磁
Relationship between controllable preparation and microstructure of NdFeB sintered magnets被引量:5
2014年
The double hard magnetic phase magnets with nominal compositions of Nd30–xDyxFe69B1(x=2, and 4)(wt.%) were prepared. The magnetic properties of the magnets were measured with a NIM-2000H hysteresigraph. The crystalline structures of the magnets were identified by X-ray diffraction(XRD). The Rietveld refinement was carried out using the FULLPROF software. The scanning electron microscopy(SEM) and transmission electron microscopy(TEM) analyses were carried out in order to investigate the microstructure of the magnets. It showed that the magnets consisted mainly of Nd2Fe14 B phase, and some Nd-rich phase. Two types of matrix-phase grains in dark grey and light grey were found in the magnets with x=2 and 4. The Dy content was obviously different in the two types of grains, which proved that the double hard magnetic phases(Dy-rich and Dy-lean phases) coexisted in the magnet. It revealed that the Nd-rich phases in junction regions had fcc structure, with the unit cell parameter of about 0.52–0.56 nm. The weak superlattice spots were found in the SAD patterns of the junction Nd-rich phases with large scale. The double hard magnetic phase structure seemed to improve the magnetic properties of NdFeB magnets with high coercivity, while decrease the consumption of Dy element, compared with the single alloy magnet.
李岩峰朱明刚李安华冯海波黄书林李卫杜安齐岩
关键词:COERCIVITY
Microstructure and magnetic properties of anisotropic hot-deformed magnet of different magnetic particle sizes被引量:5
2015年
In this paper, the magnetic Nd-Fe-B particles of different sizes were conducted under vacuum by the hot pressing, then cooled quickly to room temperature. Finally hot deformation was performed to get the anisotropy Nd-Fe- B magnet at a deformation rate of 70 % in the protection of argon atmosphere. NIM-2000 was used for the measurement of hysteresis loop of the samples. Meanwhile, scanning electron microscopy (SEM) was used to observe the surface morphology of the magnetic particles with different sizes and hot-deformed magnets, energy spectrum analyzer to analyze the composition of magnetic particles. The effect of magnetic particle sizes on the microstructure and magnetic properties of the hot-deformed anisotropic magnet was investigated. Anisotropic hot-deformed magnets produced from the maximum particle size of 200-350 μm have the highest magnetic properties of Br = 1.465 T, Hcj = 1,157 kA.m-1, (Bn)max = 425 kJ.m-3.
Xu-Chao WangMing-Gang ZhuWei LiYan-Feng LiBin LaiAn Du
关键词:SIZE
NdFeB磁体耐盐雾腐蚀行为研究被引量:4
2015年
通过中性盐雾(NSS)腐蚀试验,对比分析了烧结Nd Fe B磁体和热变形Nd Fe B磁体在NSS腐蚀环境中的耐蚀行为。研究结果表明,Nd Fe B永磁体的盐雾腐蚀进程可分为两个阶段:腐蚀增重期和失重期,并给出了相应的腐蚀反应速率方程。在NSS腐蚀环境中,热变形Nd Fe B磁体表现出更好的耐蚀性,其失重比高矫顽力烧结磁体降低了30%,认为热变形Nd Fe B磁体具有特殊的片状纳米晶组织结构,富Nd相的晶粒更加细小,分布更加均匀,使得发生晶间腐蚀的通道更窄,从而抑制了腐蚀速率,提高了磁体基体的耐蚀性。
李家节郭诚君钟明龙仲洁李安华朱明刚
关键词:NDFEB热变形盐雾腐蚀耐蚀性
共1页<1>
聚类工具0