微晶(nm)级Fe-Cu-Mo-Si-B合金软磁材料及其结构

MAGNETIC PROPERTIES AND STRUCTURE OF ULTRAFINE (um ORDER) Fe-Cu-Mo-Si-B ALLOY

本文研究了nm级微晶软磁材料Fe-Cu-Mo-Si-B合金系在不同磁退火方式以及不同热处理温度下磁性能的变化。结果表明,最佳热处理为510℃,保温1h;以缓慢冷却性能最好,并利用透射电镜,X射线衍射及热磁曲线对最佳热处理状态下的样品进行了组织观察和结构确定。该材料由两相组成:一相是a-FeSi固溶体,尺寸在10—20nm之间;另一相为非晶态。

The variation of magnetic properties with different regimes of magnetic anneal- ing and temperatures of heat treatment has been investigated on the ultrafine (nm order) soft magnetic material of Fe_(84.32)Cu_(1.06)Mo_(5.78)Si_(7.2)B_(1.64)(wt-%) alloy, prepared by annealing amorphous state and single rolling over its crystallization temperature. A optimum performance with aging at 510℃ for 1h then slow cooling was found. The structural observation under TEM toge- ther with X-ray diffraction and thermomagnetic analysis were determined that the alloy is composed of two phases, i. e. a-FeSi solid solution about size 10--20 nm, and amorphous phase.