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

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Sun Moon Univ., Asan City (KR)
OSTI Identifier:
20000761
Alternate Identifier(s):
OSTI ID: 20000761
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON BASE ALLOYS; NEODYMIUM ALLOYS; DYSPROSIUM ADDITIONS; METALLURGICAL EFFECTS; CARBON ADDITIONS; COERCIVE FORCE; MICROSTRUCTURE

Citation Formats

Jang, T., and Kim, Y.S. Effect of small dysprosium additions on the coercivity of melt-spun Nd-Fe-C alloys. United States: N. p., 1999. Web. doi:10.1109/20.800508.
Jang, T., & Kim, Y.S. Effect of small dysprosium additions on the coercivity of melt-spun Nd-Fe-C alloys. United States. doi:10.1109/20.800508.
Jang, T., and Kim, Y.S. Wed . "Effect of small dysprosium additions on the coercivity of melt-spun Nd-Fe-C alloys". United States. doi:10.1109/20.800508.
@article{osti_20000761,
title = {Effect of small dysprosium additions on the coercivity of melt-spun Nd-Fe-C alloys},
author = {Jang, T. and Kim, Y.S.},
abstractNote = {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.},
doi = {10.1109/20.800508},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}