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Coercivity Distribution and Magnetic Stability of Nd-Fe-B Alloys
1989The investigations were carried out towards two aims: 1. Analysis of magnetic stability of rare earth permanent magnets and 2. study of the magnetization behaviour of small Nd-Fe-B particles.
S. Stieler +6 more
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Temperature stability and microstructure of ultra-high intrinsic coercivity Nd-Fe-B magnets
Rare Metals, 2008The variations of intrinsic coercivity and remanence of sintered Nd-Fe-B magnets with ultra-high intrinsic coercivity were investigated. The results showed that the intrinsic coercivity and remanence declined simultaneously with increasing temperature, but the squareness of the magnets has hardly been changed. The temperature coefficients of remanence (
Z HU, X CHENG, M ZHU, W LI, F LIAN
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Effects of phosphorous doping on the stability of coercivity of cobalt-substituted acicular oxides
Journal of Applied Physics, 1995The effects of P doping on the coercivity and magnetic-thermal stability of Co-substituted iron oxides have been investigated by means of magnetic measurements, torque curves, and Mössbauer spectra. It is found that the P doping of cobalt-substituted acicular oxides promotes the coercivity and the stability with temperature of the coercivity.
J. G. Na +4 more
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Computed Temperature Stability of the Remanence and the Coercivity of Nanoscaled Permanent Magnets
physica status solidi (a), 1998For technical applications of high performance permanent magnets the stability of magnetic properties like the remanence and the coercivity over a large temperature range is a decisive prerequisite. This can be investigated by computational methods using the continuum theory of micromagnetism.
R. Fischer, H. Kronmüller
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Effect of MgO additive on coercivity, thermal stability and microstructure of NdFeB magnets
Journal of Alloys and Compounds, 1996Abstract The effect of MgO addition on the coercivity, thermal stability and microstructure of Nd 22 Fe 71 B 7 magnets has been investigated. Results show that both the coercivity and thermal stability of NdFeB magnets can be improved by the MgO additive.
Aru Yan +3 more
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Journal of Physics and Chemistry of Solids, 2019
Abstract The purpose of this paper is to explore Dy-free Nd-Fe-B magnetic alloys which could be developed into Dy-free permanent magnets operating at high temperatures. Nd13.5Fe80.5-xB6Tax (x = 0.0–1.2) alloys have been fabricated by melt spinning technique.
Sajjad Ur Rehman +9 more
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Abstract The purpose of this paper is to explore Dy-free Nd-Fe-B magnetic alloys which could be developed into Dy-free permanent magnets operating at high temperatures. Nd13.5Fe80.5-xB6Tax (x = 0.0–1.2) alloys have been fabricated by melt spinning technique.
Sajjad Ur Rehman +9 more
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Effect of Mn addition to SmFeN magnets on the thermal stability of coercivity
Journal of Alloys and Compounds, 1995Abstract It was found that the coercivity of SmFeN coarse powder is enhanced by an enrichment of the nitrogen content in combination with Mn addition; the coercivities of Sm2(Fe0.84Co0.11Mn0.05)17N5.2 and Sm2(Fe0.95Mn0.05)17 N5.5 coarse powders are 9 kOe and 7 kOe respectively. These values are 10–15 times as large as that of conventional Sm2Fe17N3
N. Imaoka +4 more
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Thermal stability of coercivity in grain boundary modified anisotropic hot-deformed Nd-Fe-B magnets
2015 IEEE Magnetics Conference (INTERMAG), 2015Development of high coercivity Dy-free Nd-Fe-B permanent magnets has been the center of research interest in permanent magnet community during past several years. The main approach to enhance the coercivity has been microstructure modifications by grain size reduction and grain boundary composition/structure modifications.
H. Sepehri-Amin +6 more
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IEEE Transactions on Magnetics, 2016
Effects of partial substitution of Ce for didymium (Pr–Nd alloy, abbreviated to Di) on elevated temperature magnetic properties in sintered (Di1– x Ce x )27.5Dy3Al0.1Cu0.1Febal.B (wt.%, $x=0~{\sim }~0.56$ ) magnets were investigated in this paper. Temperature stability of remanence was found to decrease in Ce substitution. However, the temperature
Changjiang Yan +6 more
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Effects of partial substitution of Ce for didymium (Pr–Nd alloy, abbreviated to Di) on elevated temperature magnetic properties in sintered (Di1– x Ce x )27.5Dy3Al0.1Cu0.1Febal.B (wt.%, $x=0~{\sim }~0.56$ ) magnets were investigated in this paper. Temperature stability of remanence was found to decrease in Ce substitution. However, the temperature
Changjiang Yan +6 more
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Journal of Magnetism and Magnetic Materials, 2003
By choosing the right production parameters, in-plane, uniaxial anisotropy up to about 15 Oe (1250 J/m(3)) could be induced in electrodeposited layers of Co59Fe26Ni15. This compound consists of a mixture of FCC and BCC phases. The layers were magnetically soft and nanocrystalline with grain sizes of 10-15 nm.
van Voorthuysen, EHD +3 more
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By choosing the right production parameters, in-plane, uniaxial anisotropy up to about 15 Oe (1250 J/m(3)) could be induced in electrodeposited layers of Co59Fe26Ni15. This compound consists of a mixture of FCC and BCC phases. The layers were magnetically soft and nanocrystalline with grain sizes of 10-15 nm.
van Voorthuysen, EHD +3 more
openaire +2 more sources