【摘要】 从快淬纳米晶NdFeB永磁材料的矫顽力 iHc 与晶粒直径L的关系的计算与实验 (Nd2 3 3 Fe14 B1 0 6Si0 2 1)比较得出 ,跨晶界单位面积交换作用随L的关系。随着L从 0增加到约 12 4、37 2、4 9 6nm ,交换作用相对于没有晶界相时减少到～ 80 %、～ 5 0 %、～ 4 0 %。计算运用了微磁学有限元法。更多还原

【Abstract】 The strengths of the inter grain exchange interaction were evaluated for nanocrystalline Nd 2 33 Fe 14 B 1 06 Si 0 21 magnets by comparing the i H c calculated by finite element technique of micromagnetics with the experiments With increase of the grain diameter from 0 to 12 4,37 2 and 49 6nm,the interaction in reference to that without the grain boundary phase decreases to～0 80,～0 50,and ～0 40更多还原