Fe60 Co20 C20超细合金粉末的结构和磁性能研究

采用机械合金化方法制备出Fe60Co20C20超细合金粉末,对不同球磨时间的样品进行X射线衍射和磁滞回线的测量.X射线衍射分析结果表明:样品在球磨20 h后开始部分非晶化,在Fe-Co合金中加入C可促使其形成非晶;样品的晶粒尺寸随球磨时间的增加而减小,在一定的机械合金化条件下可获得Fe60Co20C20的非晶态超细合金粉末.VSM研究结果表明:球磨初期,样品的矫顽力增加;球磨20 h后,随着晶粒尺寸的降低矫顽力降低.机械球磨后晶粒尺寸是影响样品磁性能的主要因素.

Studies on Structure and Magnetic Property of Supeffine Alloy Powder Fe60Co20C20

The superfine alloy powder Fe_(60)Co_(20)C_(20) was prepared by using mechanical alloying method.The samples collected at different ball milling time were analyzed by X-ray diffraction and magnetic hysteresis cycles.The X-ray diffraction analysis show that part of the alloy powders produced amorphous phase after ball milling 20 hours,the formation of amorphous material can be promoted by the addition of C into Fe-Co alloy,the crystal grain sizes of the alloy powders became smaller with the increase of ball milling time,and Fe_(60)Co_(20)C_(20) amorphous powders can be obtained under certain mechanical alloying conditions.The study of VSM indicated that coercive force increases at the initial stage of ball milling.Part of the alloy powders starts to become amorphous phase after ball milling 20 hours and coercive force decrease with the decrease of crystal grain sizes.The crystal grain sizes by ball milling is the primary element in affecting the magnetic properties of samples.