Investigation of simultaneous enhancement of remanence and coercivity in Nd–Fe–B/Nb mixed-powder sintered magnets

In the present work, the phenomenon of simultaneous enhancement of remanence and coercivity for Nd–Fe–B/Nb magnets prepared by sintering of mixed Nd–Fe–B and Nb powders is reported and its mechanism is investigated. The appropriate addition of Nb powder may suppress the appearance of Nd-rich phases...

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Veröffentlicht in:Journal of alloys and compounds 1999-06, Vol.288 (1), p.226-228
Hauptverfasser: Hu, Jifan, Liu, Yinglie, Yin, Malie, Wang, Yizhong, Hu, Boping, Wang, Zhenxi
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container_issue 1
container_start_page 226
container_title Journal of alloys and compounds
container_volume 288
creator Hu, Jifan
Liu, Yinglie
Yin, Malie
Wang, Yizhong
Hu, Boping
Wang, Zhenxi
description In the present work, the phenomenon of simultaneous enhancement of remanence and coercivity for Nd–Fe–B/Nb magnets prepared by sintering of mixed Nd–Fe–B and Nb powders is reported and its mechanism is investigated. The appropriate addition of Nb powder may suppress the appearance of Nd-rich phases at Nd 2Fe 14B grain boundaries and the excess Nd-rich composition may become available to form more of the Nd 2Fe 14B phase, which is responsible for the enhancement of the remanence. The reversal of hard Nd 2Fe 14B grains was suppressed by a decreasing amount of α-Fe, by better decoupling between the magnetic grains due to formation of the Nb-rich phase or by pinning of domains at the Nb-rich phase.
doi_str_mv 10.1016/S0925-8388(99)00095-X
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ispartof Journal of alloys and compounds, 1999-06, Vol.288 (1), p.226-228
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1873-4669
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source Elsevier ScienceDirect Journals
subjects Applied sciences
Coercivity
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic properties and materials
Magnets
Metals. Metallurgy
Nd-Fe-B/Nb
Permanent magnets
Physics
Remanence
Studies of specific magnetic materials
title Investigation of simultaneous enhancement of remanence and coercivity in Nd–Fe–B/Nb mixed-powder sintered magnets
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