Improvement of the magnetic properties of low-neodymium magnets by minor addition of titanium

Spyra, Marzena; Leonowicz, M.

doi:10.1016/j.jmmm.2008.02.014

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…How to optimize the microstructure is critical for the successful synthesis of the ideal nanocomposite permanent materials with higher magnetic performance. At present, composition substitution or doping [11][12][13], increasing the cooling rate [14], applying external magnetic field [15][16][17] or thermal deformation [18][19][20][21][22] are the main methods to optimize the microstructure and improve the magnetic properties experimentally. Unfortunately, the optimization of composition or manufacture process based on the principle of empiricism can only provide a qualitative guidance, and plentiful repeated experiments and statistical analysis are still needed.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution during the direct-chill casting process in a Nd–Fe–B magnet investigated by a continuum-field–multi-phase-field method

Wang

Zhao

et al. 2018

Modelling Simul. Mater. Sci. Eng.

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A continuum-field–multi-phase-field method was adopted to simulate the microstructure evolution of a Nd–Fe–B magnet during the direct-chill casting process, and the influence of temperature gradient on the microstructure evolution was focused on. Contrary to the case of uniform temperature field, the microstructure and solute atoms showed an obvious non-uniform distribution under the temperature gradient. Three totally different zones, i.e., the amorphous phase along with some nanocrystalline grains, the uniform fine grains, and the coarse grains, were discovered. Besides this, the effects of the cooling rate and the external magnetic field on the microstructure evolution were investigated. The higher the cooling rate was, the smaller the overall grain size was, and the higher the uniformity of the microstructure. The external magnetic field had a slight grain refinement effect for Nd2Fe14B (T1) phase and could restrain the formation of an amorphous phase and a Nd1+εFe4B4 (T2) phase to some extent.

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