最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
燒結(jié)釹鐵硼(Al+Cu)含量對(duì)晶界擴(kuò)散的影響
作者:
作者單位:

中國(guó)鋼研科技集團(tuán)安泰科技股份有限公司

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

安泰科技公司技創(chuàng)項(xiàng)目


Influence of (Al+Cu) content on grain boundary diffusion in Nd-Fe-B sintered magnet
Author:
Affiliation:

Central Iron and Steel Research Institute Group Advanced Technology and Materials co.,Ltd.

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    本研究對(duì)(Al+Cu)含量分別為0.25%的釹鐵硼基體和0.5%基體進(jìn)行Dy晶界擴(kuò)散,并分析了矯頑力、Dy含量分布和微觀結(jié)構(gòu)。通過(guò)比較兩種磁體的成分、性能發(fā)現(xiàn),在Dy增加量基本相同的情況下,高(Al+Cu)磁體擴(kuò)散后的矯頑力提高量相較于低(Al+Cu)磁體高37kA/m~43kA/m。進(jìn)一步進(jìn)行成分、矯頑力的梯度分析發(fā)現(xiàn),基體的(Al+Cu)含量變化并沒(méi)有改變擴(kuò)散后磁體內(nèi)部Dy元素隨擴(kuò)散深度的濃度分布,但是矯頑力梯度分析結(jié)果顯示高(Al+Cu)的各片層矯頑力提升量均比低(Al+Cu)片層高40 kA/m~80 kA/m。后續(xù)的EPMA的Dy面分布圖顯示,高(Al+Cu)基體擴(kuò)散后Dy在晶界處富集條紋更清晰、連續(xù),而TEM的EDX分析結(jié)果也顯示高(Al+Cu)樣品中晶界附近Dy含量更高。(Al+Cu)含量的提高,使得晶界相的流動(dòng)性增強(qiáng),Dy更加連續(xù)包裹主相晶粒,使得Dy增加量相同的情況下進(jìn)一步提升矯頑力。

    Abstract:

    In the present work, Nd-Fe-B base magnets with 0.5% and 0.25% (Al+Cu) were treated by Dy grain boundary diffusion process and the coercivity distribution, Dy content distribution and microstructure were analyzed. By comparing the composition and properties of the two types of magnets, it was found that the coercivity increment of high (Al + Cu) magnet is 37 kA/m ~ 43kA/m higher than that of low (Al + Cu) magnet in spite of the same Dy increment. Further gradient analysis of composition and coercivity showed that the change of (Al + Cu) content does not change Dy distribution versus to the diffusion depth, but the coercivity increments of high (Al+Cu) magnet slices were 40kA/m~ 80kA/m higher than those of low (Al+Cu) slices. The subsequent EPMA Dy mapping images showed that Dy-rich shells were distributed more clearly and continuously at the high (Al+Cu) magnet, and the TEM EDX analysis results also showed Dy concentration near the grain boundary region is higher in the high (Al+Cu) magnet. With the increase of (Al + Cu) content, the fluidity of grain boundary phase is enhanced and Dy-rich shell wraps the main phase grains more continuously, which further enhances the coercivity with the same Dy increment.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

劉濤,李建,陳杰,張昕,程星華,周磊,喻曉軍.燒結(jié)釹鐵硼(Al+Cu)含量對(duì)晶界擴(kuò)散的影響[J].稀有金屬材料與工程,2021,50(10):3765~3770.[Tao Liu, Jian Li, Jie Chen, Xin Zhang, Xinghua Cheng, Lei Zhou, Xiaojun Yu. Influence of (Al+Cu) content on grain boundary diffusion in Nd-Fe-B sintered magnet[J]. Rare Metal Materials and Engineering,2021,50(10):3765~3770.]
DOI：10.12442/j. issn.1002-185X.20200841

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2020-11-02
  • 最后修改日期:2021-02-20
  • 錄用日期:2021-03-08
  • 在線發(fā)布日期: 2021-10-28
  • 出版日期: 2021-10-25