Corrosion-resistant Nd-TM-B magnet

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/20.104577· OSTI ID:5764791

Shimotomai, M; Fukuda, Y; Fujita, A; Ozaki, Y ^[1]

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1. Technical Research Div., Kawasaki Steel Corp., Chiba 260 (JP)

In search for a compatibility of magnetic properties and corrosion resistance, a pseudoternary system Nd-(Fe{sub 1{minus}x{minus}y}Co{sub x}Ni{sub y})-B was studied in forms of melt-spun ribbons and sintered bodies. It has been found that the double substitutions with 0.2 {le} x {le} 0.45 and 0.05 {le} y {le} 0.25 in the composition of 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){sub max} and {sub i}H{sub c} in sintered magnets of Nd{sub 15}(Fe{sub .585}Co{sub .3}Ni{sub .1}Ti{sub .015}){sub 77}B{sub 8} have amounted to 34 MGOe and 10.4 kOe, respectively.

• OSTI ID: 5764791
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA) Vol. 26:5; ISSN 0018-9464; ISSN IEMGA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOY SYSTEMS
ALLOYS
BORON ALLOYS
COERCIVE FORCE
CORROSION RESISTANCE
FABRICATION
MAGNETIC PROPERTIES
MAGNETS
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SINTERING
TERNARY ALLOY SYSTEMS
THULIUM ALLOYS