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| Effects of the addition of lubricant on the magnetic properties of NdFeB sintered magnets |
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| 1.山东大学; 1.烟台首钢磁性材料股份有限公司 |
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Cite this article:
;. Effects of the addition of lubricant on the magnetic properties of NdFeB sintered magnets. Chin J Mater Res, 2004, 18(6): 577-581.
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Abstract Powder flowability and effects of adding lubricant on the powder flowability,
the alignment degree and the magnetic properties of sintered NdFeB magnet have
been studied. The results show that the main factor affecting powder flowability
is the aggregation of powder particles while the powders are in incompact state and
the friction between the powder particles while the powders are in compact state.
The addition of lubricant with suitable dose can slightly prevent the aggregation
of powders, obviously decrease the friction between the powder particles, improve the
powder flowability, and increase the alignment degree, remanent magnetization and
energy product density of sintered magnets. By adding suitable lubricant dose and
adopting rubber isostatic pressing (RIP), we have succeeded in mass producing the
sintered NdFeB magnet with high hard magnetic properties of $B_{\rm r}$=1.457 T,
$_{\rm j}H_{\rm c}$=1148 kA/m(14.43 kOe), $(BH)_{\rm max}$ =
408 kJ/m$^{3}$(51.3 MGOe).
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Received: 29 December 2004
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