Temperature Compensation of Bonded Rare-Earth Magnets By Blending of Alloy Powders

提出了温度补偿型磁性材料的研究方向。第二阶段通过采用铸造、烧结和热处理的先进加工技术，寻求具有适当高矫直力和能量产品的改进的基合金和补偿合金。这些合金的混合物被粘合成具有特定磁化温度系数的磁体。使用计算机模型来预测共混物的性能。在第一阶段中，提出了粘结稀土永磁体的内部温度补偿方法。这对于基于ND-Fe-B的粘结磁体来说是有意义的，其在0℃到+150℃的典型使用范围内的自发磁化强度与温度的强烈相关性在许多应用中是一个问题，因为磁化强度会随着温度的升高而迅速下降。

Proposed is research on temperature-compensated magnetic materials. Phase II seeks improved base and compensation alloys with suitably high coercivities and energy products by advanced processing techniques employing casting, sintering and thermal treatments. Blends of these alloys are bonded into magnets with specific temperature coefficients of magnetization. A computer model is used to predict properties of blends. In Phase I a method of internal temperature compensation for bonded rare-earth permanent magnets was demonstrated. This is of interest for bonded magnets based on Nd-Fe-B, whose strong temperature dependence of spontaneous magnetization in the typical use range of 0 degrees C to +150 degrees C is a problem in many applications since magnetization can decrease rapidly as temperature increases.