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

被引：5

作者：

Filip, O.

Hermann, R.

Gerbeth, G.

Priede, J.

Shatrov, V.

Gueth, A.

Schultz, L.

机构：

[1] Leibniz Inst solid State & Mat Res IFW Dresden, D-01171 Dresden, Germany

[2] Forschungszentrum Rossendorf EV, Inst Safety Res, D-01314 Dresden, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

Nd-Fe-B magnets; solidification; melt convection; levitation;

D O I：

10.1016/j.jmmm.2003.12.1070

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of melt rotation on the microstructure formation of Nd - Fe - B alloys, mainly the volume fraction and grain size of the alpha-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 alpha-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. (C) 2004 Elsevier B. V. All rights reserved.

引用

页码：E1857 / E1858

页数：2

共 5 条

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[5] Three-dimensional linear stability analysis of the flow in a liquid spherical droplet driven by an alternating magnetic field
Shatrov, V
Priede, J
Gerbeth, G
[J]. PHYSICS OF FLUIDS, 2003, 15 (03) : 668 - 678

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