摘要
通过实验研究了Nd2Fe14B/Fe3B双相纳米复合磁粉分别与几种不同性能的磁粉复合成粘结磁体后磁性能的变化。通过对复合磁体的理论分析得知,由Nd2Fe14B/Fe3B与RE2Fe14B或铁氧体磁粉复合成的粘结磁体中,成分间并未发生化学反应。以Nd2Fe14B/Fe3B—铁氧体复合粘结磁体为例,根据理论分析推出的剩磁Br—成分含量关系曲线与实际曲线吻合得很好,表明剩磁与成分含量间存在着近似的线性关系,从而可通过数学手段建立磁性能参数与成分含量的函数关系式,用于简化混粉工艺。另外,添加铁氧体可对该复合磁体较差的热稳定性起到补偿作用,并减少了磁不可逆损失。
The change of magnetic property and its type of compound bonded magnets made of Nd_2Fe_(14)B/Fe_3B respectively with different magnetic powders were investigated by experiment. It was found that no chemical reaction takes place in Nd_2Fe_(14)B/Fe_3B-RE_2Fe_(14)B and Nd_2Fe_(14)B/Fe_3B-Ferrite compound bonded magnets by means of theoretic analysis. Taking Nd_2Fe_(14)B/Fe_3B-Ferrite compound magnets as an example, its predicted and measured B_r-composition curves overlapped very well, which indicated that there was an approximately linear relation between them. Therefore, the process of mixing magnetic powders can be simplified by the functional relation between magnetic property and composition established by mathematical method. Besides, the lower thermal stability of the compound magnets was compensated, and its h_(irr) was decreased due to the addition of ferrite.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2004年第3期64-67,共4页
Journal of Iron and Steel Research
关键词
纳米复合材料
粘结磁体
剩磁
热稳定性
力学性能
nanocomposite
bonded magnet
remanence
thermal stability
mechanical property
