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Title: Atom probe characterization of an {alpha}-Fe/Nd{sub 2}Fe{sub 14}B nanocomposite magnet with a remaining amorphous phase

Abstract

The microstructural features of Nd{sub 8}Fe{sub 76.5}Co{sub 8}B{sub 6}Cu{sub 0.5}Nb{sub 1} nanocomposite magnet have been studied by a three-dimensional atom probe (3DAP) and transmission electron microscopy (TEM). The as-melt-spun microstructure is composed of {alpha}-Fe, Nd{sub 2}Fe{sub 14}B and a large fraction of intergranular amorphous phase. The annealed microstructure with optimum magnetic properties contains the same constituent phases as those in the as-quenched state, but the volume fraction of the Nd{sub 2}Fe{sub 14}B grains is increased by partial crystallization of the remaining amorphous phase. Nb and B are found to be enriched in the remaining amorphous phase. Unlike Fe{sub 3}B/Nd{sub 2}Fe{sub 14}B nanocomposite, Cu additions are not effective in refining the grain size in this system.

Authors:
; ;
Publication Date:
Research Org.:
National Research Inst. for Metals, Tsukuba (JP)
OSTI Identifier:
20000758
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; MICROSTRUCTURE; NEODYMIUM ALLOYS; IRON BASE ALLOYS; COBALT ALLOYS; BORON ALLOYS; COPPER ADDITIONS; NIOBIUM ALLOYS; COMPOSITE MATERIALS; MAGNETIC PROPERTIES; IRON-ALPHA

Citation Formats

Wu, Y.Q., Ping, D.H., and Hono, K. Atom probe characterization of an {alpha}-Fe/Nd{sub 2}Fe{sub 14}B nanocomposite magnet with a remaining amorphous phase. United States: N. p., 1999. Web. doi:10.1109/20.800503.
Wu, Y.Q., Ping, D.H., & Hono, K. Atom probe characterization of an {alpha}-Fe/Nd{sub 2}Fe{sub 14}B nanocomposite magnet with a remaining amorphous phase. United States. doi:10.1109/20.800503.
Wu, Y.Q., Ping, D.H., and Hono, K. Wed . "Atom probe characterization of an {alpha}-Fe/Nd{sub 2}Fe{sub 14}B nanocomposite magnet with a remaining amorphous phase". United States. doi:10.1109/20.800503.
@article{osti_20000758,
title = {Atom probe characterization of an {alpha}-Fe/Nd{sub 2}Fe{sub 14}B nanocomposite magnet with a remaining amorphous phase},
author = {Wu, Y.Q. and Ping, D.H. and Hono, K.},
abstractNote = {The microstructural features of Nd{sub 8}Fe{sub 76.5}Co{sub 8}B{sub 6}Cu{sub 0.5}Nb{sub 1} nanocomposite magnet have been studied by a three-dimensional atom probe (3DAP) and transmission electron microscopy (TEM). The as-melt-spun microstructure is composed of {alpha}-Fe, Nd{sub 2}Fe{sub 14}B and a large fraction of intergranular amorphous phase. The annealed microstructure with optimum magnetic properties contains the same constituent phases as those in the as-quenched state, but the volume fraction of the Nd{sub 2}Fe{sub 14}B grains is increased by partial crystallization of the remaining amorphous phase. Nb and B are found to be enriched in the remaining amorphous phase. Unlike Fe{sub 3}B/Nd{sub 2}Fe{sub 14}B nanocomposite, Cu additions are not effective in refining the grain size in this system.},
doi = {10.1109/20.800503},
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}
}