中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (1): 83-84.

• 研究简报 • 上一篇    下一篇

Nd-Fe-B-Si合金的研究

杨健美, 苏锵, 宋连仁, 王鸿燕   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1988-01-30 修回日期:1988-05-26 出版日期:1989-02-10 发布日期:1989-02-10

STUDY ON THE Nd-Fe-B-Si ALLOYS

Yang Jianmci, Su Qiang, Song Lianren, Wang Hongyan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1988-01-30 Revised:1988-05-26 Published:1989-02-10 Online:1989-02-10

PDF

405

被引次数

2 | 1

摘要： 为了探索提高Nd-Fe-B磁性材料的居里温度TC,我们采用了与文献不同的组成和制 条件,研究了Si对合金的物相、TC等的影响,得出Nd-Fe-B-Si是一种有希望的非钴高居里温度合金体系. 试样系以钕铁、硅铁、硼铁和还原铁粉为原料,按 Nd15Fe77-xSixB8(x=4、8、16、18 at%)配比,在石墨电阻炉内于Ar气保护下熔炼而成.T-σ曲线在日本MB-2型磁天平上测得;微区分析和x-射线衍射分别用JXA-840扫描电镜和日本理学2028x-射线衍射仪进行.

关键词: 钕铁硼永磁材料, 铁基稀土永磁材料, 合金

Abstract: Si-doped Nd-Fe-B-alloys (Nd15Fe77-xSixB8, x= 4, 8, 16, 18 at% ) were prepared in a gra-phite furnace. X-ray diffraction and scanning electron micrographs of the products showedthat besides Nd2Fe14 B there were some Nd-rich phases when silicon had doped in at 8 at%.The Curie temperature(Tc) was increased from 310℃ to 350℃ by do ping with 8--16at% silicon. When Si content was greater than 16 at%, a new phase was formed and theTc of the alloy markedly decreased. The density of the alloy slightly deereases with inc-rease of Si when Si content is over 4 at%. The hardness of the alloy has a maximum va-lue at about 8 at% of Si.

Key words: Nd-Fe-B permanent magnet mattrial, Iron base RE permanet magnet, mater al, Alloy

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