Permanent magnetic materials based on Nd2Fe14C prepared by melt spinning

Permanent magnetic materials containing the intermetallic compound Nd2Fe14C were obtained by annealing melt-spun flakes. As quenched flakes with compositions close to the stoichiometric composition consist of α-Fe, Nd2Fe17 with some dissolved carbon, and an amorphous phase. At approximately 700 °C N...

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Veröffentlicht in:	Journal of applied physics 1989-01, Vol.65 (2), p.704-709
Hauptverfasser:	COEHOORN, R, DUCHATEAU, J. P. W. B, DENISSEN, C. J. M
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Magnetic properties and materials Metals. Metallurgy Other topics in magnetic properties and materials Physics
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Zusammenfassung:	Permanent magnetic materials containing the intermetallic compound Nd2Fe14C were obtained by annealing melt-spun flakes. As quenched flakes with compositions close to the stoichiometric composition consist of α-Fe, Nd2Fe17 with some dissolved carbon, and an amorphous phase. At approximately 700 °C Nd2Fe14C is formed in a solid-state reaction. The amount of Nd2Fe14C formed, the presence of secondary phases, and the magnetic properties depend strongly on the composition. Samples with the composition Nd13.5Fe79.6C6.9 contain only a small fraction of secondary phases. The remanence and intrinsic coercive field are 0.72 T and 800 kA/m, respectively. The kinetics of the phase transformation, as well as the thermodynamics of the phase equilibria in the relevant part of the Nd-Fe-C system are discussed.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.343107