Effect of small dysprosium additions on the coercivity of melt-spun Nd-Fe-C alloys

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.800508· OSTI ID:20000761

Jang, T; Kim, Y S

The influence of small dysprosium additions on the microstructural development and the coercivity of melt-spun iron-rich Nd{sub 15{minus}x}Dy{sub x}Fe{sub 77}C{sub 8} (x = 0.5 {approximately} 5/0) alloys was investigated. By x-ray diffraction analysis, it was found that amorphization of as-spun ribbons spun at 25 m/s was promoted by increasing the Dy addition. The ribbons became fully amorphous with 5.0 at% Dy. Small additions of Dy not only improved the thermal stability of Nd{sub 2}Fe{sub 14}C, resulting in a large increase in coercivity. When the addition of Dy was more than 3.0 at%, the intrinsic coercivities of more than 17 kOe, which would be the highest coercivity ever obtained from iron-rich Nd-Fe-C alloys, were easily obtained after annealing 10 min. at 800 {approximately} 900 C.

• Research Organization: Sun Moon Univ., Asan City (KR)
• OSTI ID: 20000761
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers) Journal Issue: 5Pt2 Vol. 35; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON ADDITIONS
COERCIVE FORCE
DYSPROSIUM ADDITIONS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
MICROSTRUCTURE
NEODYMIUM ALLOYS