Effects of nitride additions on the magnetic properties of F-Fe-B magnets (R = rare earths)

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/10.1109/20.104823· OSTI ID:5941225

Heh, S J; Lin, K D; Jein, Y M; King, F D; Lee, F L ^[1]; Chin, T S ^[2]

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1. High End Metals Corp., Hsinchu Industrial Park, Hsinchu (TW)
2. Dept. of Materials Science and Engineering, National Tsing Hua Univ., Hsinchu 30043 (TW)

Several nitrides, including BN, A1N, VN, TiN, NbN, CrN, HfN, TaN, ZrN, and Si{sub 3}N{sub 4} were doped into R-(Fe,M)-B magnets (R = rare earths, M = Al/Co). Coercivities were 6 to 20% enhanced at small additions of 0.1 to 0.2 wt%. Remanence, maximum energy product and temperature coefficients were all improved. BN, A1N, TiN and Si{sub 3}N{sub 4} were found to be the most effective in the enhancement. It is found that the increase in sintered density and the modification in intergranular phase due to the reaction between nitrides and the Nd-rich phase are the main reasons of the improvements.

• OSTI ID: 5941225
• 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 IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BORIDES
BORON COMPOUNDS
CHEMICAL COMPOSITION
CHROMIUM COMPOUNDS
CHROMIUM NITRIDES
COERCIVE FORCE
CRYSTAL DOPING
ELEMENTS
IRON
MAGNETIC PROPERTIES
MAGNETS
MATERIALS TESTING
METALS
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PNICTIDES
RARE EARTH COMPOUNDS
REACTIVITY COEFFICIENTS
REFRACTORY METAL COMPOUNDS
TANTALUM COMPOUNDS
TANTALUM NITRIDES
TEMPERATURE COEFFICIENT
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM NITRIDES