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Influence of melt convection on microstructure evolution of Nd-Fe-B alloys using a forced crucible rotation technique

Biswas, K.; Hermann, R.; Filip, O.; Acker, J.; Gerbeth, G.; Priede, J.
The forced crucible rotation technique has been applied to the solidification of Nd-Fe-B alloys. Specially sealed samples were subjected to well-defined forced rotation during induction heating and solidification. The resulting microstructure of the Nd-Fe-B alloys in consideration of melt convection has been investigated using scanning electron probe microscopy. The determination of the a-Fe volume fraction by measuring the magnetic moment in a vibrating sample magnetometer (VSM) resulted in a distinct reduction of the a-Fe volume fraction in samples with high crucible rotation frequencies. Furthermore, a new category of experiment has been started where a tailored magnetic field was applied in order to study the microstructure evolution due to an enhancement or suppression of the melt convection by additional alternating magnetic fields.
  • Lecture (Conference)
    Magnetic and Superconducting Materials, 05.-09.09.2005, Agadir, Marocco
  • Physica Status Solidi (C) 3(2006), 3277-3280

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Permalink: https://www.hzdr.de/publications/Publ-7621
Publ.-Id: 7621