Corrosion-resistance Nd-TM-B magnet

Author

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

Author_Institution

Kawasaki Steel Corp., Chiba, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1939

Lastpage

1941

Abstract

A search for compatibility between magnetic properties and corrosion resistance was made by studying a pseudoternary system, Nd-(Fe _1-x-yCo_xNi_y)-B, of melt-spun ribbons and sintered bodies. It was found that the double substitutions with 0.2⩽x⩽0.45 and 0.05⩽y≪0.25 in the composition of the ordinary Nd-Fe-B 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 _iH_c in sintered magnets of Nd₁₅(Fe_0.585Co_0.3Ni _0.1Ti_0.015)₇₇B₈ amounted to 34 MGOe and 10.4 kOe, respectively

Keywords

boron alloys; cobalt alloys; corrosion; iron alloys; magnetic properties of substances; neodymium alloys; nickel alloys; Nd-TM-B magnet; coercivity; corrosion resistance; demagnetization curve; magnetic properties; melt-spun ribbons; pseudoternary system; sintered bodies; Coatings; Coercive force; Cooling; Corrosion; Immune system; Iron; Magnetic field measurement; Magnetic materials; Magnetic properties; Neodymium;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104577

Filename

104577