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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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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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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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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 Magnetism and Magnetic Materials, 1992
Abstract The influence of both heat treatment in various atmospheres and electrotechnical coatings on the coercive torce and its long time stability for amorphous Fe 80.5 B 12 Si 6.5 C 1 alloys was studied. A number of factors, predominantly chemical processes, acting at the heat treatment and the coating deposition, are discussed.
A. Košturiak, O. Duša, J. Gajdušek
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Abstract The influence of both heat treatment in various atmospheres and electrotechnical coatings on the coercive torce and its long time stability for amorphous Fe 80.5 B 12 Si 6.5 C 1 alloys was studied. A number of factors, predominantly chemical processes, acting at the heat treatment and the coating deposition, are discussed.
A. Košturiak, O. Duša, J. Gajdušek
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Applied Physics Letters, 2012
Highly anisotropic Nd13Fe79.4B7Nb0.3Ga0.3 powders from a self-organized rod-like disproportionation microstructure and room temperature magnetic properties of μ0Mr = 1.4 T, iHc = 13 kOe, and (BH)max = 41 MGOe are obtained by optimizing hydrogenation disproportionation desorption recombination (HDDR) process.
Zhong Lin +8 more
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Highly anisotropic Nd13Fe79.4B7Nb0.3Ga0.3 powders from a self-organized rod-like disproportionation microstructure and room temperature magnetic properties of μ0Mr = 1.4 T, iHc = 13 kOe, and (BH)max = 41 MGOe are obtained by optimizing hydrogenation disproportionation desorption recombination (HDDR) process.
Zhong Lin +8 more
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A Structural Framework for the Riemann Hypothesis via Coercivity and Surrogate Stability
We present a falsifiable analytic structure for the Riemann Hypothesis based on the coercivityof a Mellin-Hilbert Gram operator. This framework is structurally coherent and empiricallystable. It does not claim logical completeness or final proof, but offers a recurrence-resistantflow formalized within ZFC and supported by surrogate estimates.openaire +1 more source
Ultra-high coercivity Sm-Co bulk magnets with remarkable thermal stability
Scripta Materialia, 2022Kwangjae Park +3 more
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Spectral Stability of NBBD under Sparse Zero Tolerance: A Probabilistic Coercivity Framework
We present a reproducible analytic framework for NBBD completeness under sparse zerotolerance. By introducing a probabilistic mean-oscillation space X′, we establish A2 control forthe weight w = e2F , where F = log |U(σ + it)|. This ensures coercivity of the Mellin-HilbertGram operator T00, and spectral stability near the critical line.openaire +1 more source