Permanent magnetic materials based on Nd2Fe1 4C prepared by melt spinning

R. Coehoorn, J.P.W.B. Duchateau, C.J.M. Denissen

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Abstract

Permanent magnetic materials containing the intermetallic compound Nd 2Fe14C 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 Nd13.5Fe 79.6C6.9 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.

Original languageEnglish
Pages (from-to)704-709
Number of pages6
JournalJournal of Applied Physics
Volume65
Issue number2
DOIs
Publication statusPublished - 1 Dec 1989
Externally publishedYes

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