The dip in the magnetization curves of sintered Nd-Fe-B magnets with different degrees of texture

Handstein, A.; Müller, K.‐H.; Eckert, D.; Nothnagel, P.

doi:10.1016/0304-8853(91)90787-b

Cited by 11 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a rough approximation this component may be considered as an additional soft magnetic phase, the portion of which increases with decreasing temperature (Müller et al 1987a). It has been shown that the spin reorientation below about 140 K has a strong influence on the demagnetization curve, in dependence with texture degree , Handstein et al 1991a. Lileev et al (1996) showed, in Nd-Fe-B alloys partially substituted by Tb, Dy and Co, in addition to a 'dip' in the demagnetization curve, at 4.2 K, both discontinuous changes in the magnetic moment and the influence of the magnetic history of the sample.…”

Section: Magnetization Curvesmentioning

confidence: 99%

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Burzo

1998

Rep. Prog. Phys.

208

View full text Add to dashboard Cite

A review is given on the basic properties of 2:14:1 hard magnetic phases as well as technological procedures used for manufacturing R-Fe-B and R-Fe-C permanent magnets. First, we analyse the phase diagrams, crystal structure of hard magnetic phases and composition ranges in which these phases form solid solutions, as a result of various types of substitution. Then, the magnetic properties of R 2 Fe 14 B-, R 2 Fe 14 C-and R 2 Co 14 Bbased compounds are described. The routes used for manufacturing R-Fe-B and R-Fe-C permanent magnets are detailed. The magnets' microstructure as well as their coercivities are described in correlation with composition and manufacturing routes. The properties of nanostructure magnets are then presented. Finally, the stability of Nd-Fe-B and Nd-Fe-C magnets in various working conditions is analysed.

show abstract

Section: Magnetization Curvesmentioning

confidence: 99%

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Burzo

1998

Rep. Prog. Phys.

208

View full text Add to dashboard Cite

show abstract

“…This is true in spite of the fact that PBMs are magnetically weaker than equivalent fully dense (sintered) metallic magnets. The reason for their popularity is their suitability to very high volume, net shape plastic manufacturing techniques 1–10. PBMs are prepared by blending magnetic powder with a thermoplastic or thermosetting polymer binder.…”

Section: Introductionmentioning

confidence: 99%

Polyimide bonded magnets: Processing and properties

Yudin

Otaigbe

Bui

et al. 2003

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:We report a new method of polyimide synthesis based on the interaction of dianhydrides with acylated diamines for preparing a melt processable mixture of prepolymer and rare earth magnetic alloy particles in the form of 75-100 m particles. This mixture can be easily converted to useful thermoplastic polyimide bonded magnets by heating at 300°C. It is shown that the prepolymer based on 1,3-bis(3,4-dicarboxyphenoxy)benzene dianhydride and the diacetyl derivative of 2,2-bis(4-(4-aminophenoxy)phenyl)sulfone diamine after removing less than 5% by weight of the volatile components can be melted at 220 -240°C to give a fluid with a viscosity of 10 -20 Pas. This low viscosity of the prepolymer facilitates blending it with magnetic particles at relatively high volume fractions (up to 85 vol %) that are not possible using conventional methods. The resulting polyimide-bonded magnets exhibit excellent thermal stability and a high storage modulus of 10 GPa at 400°C. Magnetic property measurements showed a Ն10% increase in energy products over that of typical commercial bonded magnet materials such as the ones containing thermoplastic poly(phenylene sulfide) or polyamide matrices.

show abstract

Calculation of magnetization curves of permanent magnet materials

Christoph

Müller

1991

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

The dip in the magnetization curves of sintered Nd-Fe-B magnets with different degrees of texture

Cited by 11 publications

References 6 publications

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Permanent magnets based on R-Fe-B and R-Fe-C alloys

Polyimide bonded magnets: Processing and properties

Calculation of magnetization curves of permanent magnet materials

Contact Info

Product

Resources

About