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 journalArticle

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 languageEnglish
Pages (from-to)E1857-E1858
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
Early online date14 Jan 2004
DOIs
Publication statusPublished - May 2004
Externally publishedYes

Keywords

  • Levitation
  • Melt convection
  • Nd-Fe-B magnets
  • Solidification

ASJC Scopus subject areas

  • Condensed Matter Physics

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