Design and fabrication of sintered Nd-Fe-B magnets with a low temperature coefficient of intrinsic coercivity
Cui X.G., Yan M., Ma T.Y. and 2 more
Science of Sintering · 2009
doi:10.2298/sos0901091c (opens in a new tab)
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Abstract
To decrease the temperature coefficients of sintered Nd-Fe-B magnets, the influencing factors on temperature coefficients, especially the reversible temperature coefficient β of intrinsic coercivity Hcj, were analyzed. The results showed that the absolute value of β decreased with increasing Hcj and also the ratio of microstructure parameter c to Neff, indicating that the increase of magnetocrystalline anisotropy field HA and c/Neff can effectively decrease the absolute value of β. On the basis of this analysis, a sintered Nd-Fe-B magnet with a low temperature coefficient of Hcj was fabricated through composition design, and the value of β was only -0.385%/ºC in the temperature interval of 20-150ºC.
Abstract licence: CC BY
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