Title :
Corrosion-resistance Nd-TM-B magnet
Author :
Shimotomai, M. ; Fukuda, Y. ; Fujita, A. ; Ozaki, Y.
Author_Institution :
Kawasaki Steel Corp., Chiba, Japan
fDate :
9/1/1990 12:00:00 AM
Abstract :
A search for compatibility between magnetic properties and corrosion resistance was made by studying a pseudoternary system, Nd-(Fe 1-x-yCoxNiy)-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 iHc in sintered magnets of Nd15(Fe0.585Co0.3Ni 0.1Ti0.015)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;
Journal_Title :
Magnetics, IEEE Transactions on
