Corrosion-Resistant Nd-TM-B Magnet

M. Shimotomai, Y. Fukuda, A. Fujita, Y. Ozaki

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Abstract

In search for a compatibility of magnetic properties and corrosion resistance, a pseudo-ternary system Nd-(Fe1-x-yCoxNiy)-B was studied in forms of melt-spun ribbons and sintered bodies. It has been found that the double substitutions with 0.2≤x≤0.45 and 0.05≤y≤0.25 in the composition of ordinary NdFeB magnet yield good corrosion resistance and also preserve moderate coercivity values. A further small, substitution of Ti atoms for Fe atoms enhances the coercivity and makes the demagnetization curve rectangular. For example, (BH)max and iHc in sintered magnets of Nd15(Fe.585Co.3Ni.1Ti.015)77B8 have amounted to 34 MGOe and 10.4 kOe, respectively.

Original languageEnglish
Pages (from-to)1939-1941
Number of pages3
JournalIEEE Transactions on Magnetics
Volume26
Issue number5
DOIs
Publication statusPublished - Sep 1990
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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