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

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

doi:10.1063/1.343107

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

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

Research output: Contribution to journal › Article › Academic › peer-review

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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 Nd_13.5Fe _79.6C_6.9 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 language	English
Pages (from-to)	704-709
Number of pages	6
Journal	Journal of Applied Physics
Volume	65
Issue number	2
DOIs	https://doi.org/10.1063/1.343107
Publication status	Published - 1 Dec 1989
Externally published	Yes

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title = "Permanent magnetic materials based on Nd2Fe1 4C prepared by melt spinning",

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.",

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AU - Coehoorn, R.

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AU - Denissen, C.J.M.

PY - 1989/12/1

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N2 - 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.

AB - 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.

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

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