Hard magnetic properties of Fe-Nd-B alloys containing intergranular amorphous phase

Journal Article · Tue Oct 31 23:00:00 EST 1995 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.489590· OSTI ID:186928

Inoue, Akihisa; Takeuchi, Akira; Masumoto, Tsuyoshi ^[1]; Makino, Akihiro ^[2]

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1. Tohoku Univ., Sendai (Japan). Inst. for Materials Research
2. Alps Electrical Co. Ltd., Nagaoka (Japan)

Fe-rich Fe-Nd-B amorphous alloys containing 88 to 90 at% Fe annealed for 60--300 s at 923--1,023 K have the nanostructure consisting of bcc-Fe, Fe{sub 14}Nd{sub 2}B and remaining amorphous phases, and exhibit rather good hard magnetic properties, i.e., remanence (Br) of 1.28 T, coercive field (iHc) of 252 kA/m and maximum energy product ((BH){sub max}) of 146 kJ/m{sup 3} for Fe{sub 89}Nd{sub 7}B{sub 4}. The nanoscale Fe{sub 14}Nd{sub 2}B particles with a size of about 30 nm are surrounded by the bcc-Fe and amorphous phases which act as a magnetic exchange-coupled medium. The nanoscale coexistence of the three ferromagnetic phases is important for the achievement of the rather good hard magnetic properties. The simultaneous achievement of the high Br and (BH){sub max} values and the residual existence of the amorphous phase for the Fe-rich alloys containing about 90 at% Fe has significant engineering importance because of the expectations of high deformability and low cost.

• OSTI ID: 186928
• Report Number(s): CONF-950404--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 6Pt2 Vol. 31; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
BORON ALLOYS
EXPERIMENTAL DATA
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MATERIALS WORKING
MICROSTRUCTURE
NEODYMIUM ALLOYS