Influence of melt convection on the microstructure of levitated and undercooled Nd-Fe-B alloys

O. Filip; R. Hermann; G. Gerbeth; J. Priede; V. Shatrov; A. Gueth; L. Schultz

doi:10.1016/j.jmmm.2003.12.1070

Influence of melt convection on the microstructure of levitated and undercooled Nd-Fe-B alloys

O. Filip, R. Hermann, G. Gerbeth, J. Priede, V. Shatrov, A. Gueth, L. Schultz

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

6 Citations (Scopus)

Abstract

The influence of melt rotation on the microstructure formation of Nd-Fe-B alloys, mainly the volume fraction and grain size of the α-Fe phase, is investigated using the electromagnetic levitation technique. Molten droplets were subjected to a strong rotation during levitation and compared to fixed samples without rotation. Additionally, experiments have been carried out where sealed samples were subjected to a well-defined forced rotation. A distinct reduction of the α-Fe volume fraction in samples with strong rotation was observed by measuring the magnetic moment. The melt flow in a levitated droplet is studied numerically under the additional effect of a global sample rotation which may give a strong suppression of internal motions.

Original language	English
Pages (from-to)	E1857-E1858
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
Early online date	14 Jan 2004
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.1070
Publication status	Published - May 2004
Externally published	Yes

Keywords

Levitation
Melt convection
Nd-Fe-B magnets
Solidification

ASJC Scopus subject areas

Condensed Matter Physics

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10.1016/j.jmmm.2003.12.1070

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title = "Influence of melt convection on the microstructure of levitated and undercooled Nd-Fe-B alloys",

abstract = "The influence of melt rotation on the microstructure formation of Nd-Fe-B alloys, mainly the volume fraction and grain size of the α-Fe phase, is investigated using the electromagnetic levitation technique. Molten droplets were subjected to a strong rotation during levitation and compared to fixed samples without rotation. Additionally, experiments have been carried out where sealed samples were subjected to a well-defined forced rotation. A distinct reduction of the α-Fe volume fraction in samples with strong rotation was observed by measuring the magnetic moment. The melt flow in a levitated droplet is studied numerically under the additional effect of a global sample rotation which may give a strong suppression of internal motions.",

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T1 - Influence of melt convection on the microstructure of levitated and undercooled Nd-Fe-B alloys

AU - Filip, O.

AU - Hermann, R.

AU - Gerbeth, G.

AU - Priede, J.

AU - Shatrov, V.

AU - Gueth, A.

AU - Schultz, L.

PY - 2004/5

Y1 - 2004/5

N2 - The influence of melt rotation on the microstructure formation of Nd-Fe-B alloys, mainly the volume fraction and grain size of the α-Fe phase, is investigated using the electromagnetic levitation technique. Molten droplets were subjected to a strong rotation during levitation and compared to fixed samples without rotation. Additionally, experiments have been carried out where sealed samples were subjected to a well-defined forced rotation. A distinct reduction of the α-Fe volume fraction in samples with strong rotation was observed by measuring the magnetic moment. The melt flow in a levitated droplet is studied numerically under the additional effect of a global sample rotation which may give a strong suppression of internal motions.

AB - The influence of melt rotation on the microstructure formation of Nd-Fe-B alloys, mainly the volume fraction and grain size of the α-Fe phase, is investigated using the electromagnetic levitation technique. Molten droplets were subjected to a strong rotation during levitation and compared to fixed samples without rotation. Additionally, experiments have been carried out where sealed samples were subjected to a well-defined forced rotation. A distinct reduction of the α-Fe volume fraction in samples with strong rotation was observed by measuring the magnetic moment. The melt flow in a levitated droplet is studied numerically under the additional effect of a global sample rotation which may give a strong suppression of internal motions.

KW - Levitation

KW - Melt convection

KW - Nd-Fe-B magnets

KW - Solidification

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VL - 272-276

SP - E1857-E1858

JO - Journal of Magnetism and Magnetic Materials

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IS - SUPPL. 1

ER -

Influence of melt convection on the microstructure of levitated and undercooled Nd-Fe-B alloys

Abstract

Keywords

ASJC Scopus subject areas

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