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机械合金化Fe-Si合金的微结构与磁性
引用本文:周铁军,王敦辉,章建荣,都有为,王锦辉,陈允鸿.机械合金化Fe-Si合金的微结构与磁性[J].物理学报,1997,46(11):2250-2257.
作者姓名:周铁军  王敦辉  章建荣  都有为  王锦辉  陈允鸿
作者单位:(1)南京大学物理系固体微结构物理国家重点实验室; (2)扬州大学师范学院物理系
摘    要:用机械合金化方法制备了不同成分的Fe-Si合金.其晶粒具有α-Fe结构,粒径为十几到几十纳米,且晶格存在严重畸变.它们的饱和磁化强度σs与Si含量近似成线性关系,只是稍小于相应的单晶和多晶Fe-Si合金,而其矫顽力Hc和有效各向异性常数Keff却远大于相应的单晶和多晶Fe-Si合金.它们的磁谱除Fe75Si25外都是弛豫型的,其磁导率的大小与相应的铁氧体复合材料差不多.在它们的磁化过程中,畴壁位移 关键词

关 键 词:机械合金化  铁硅合金  微结构  软磁合金
收稿时间:1996-12-06

MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-Si ALLOYS PREPARED BY-MECHANICAL ALLOYING
ZHOU TIE-JUN,WANG DUN-HUI,ZHANG JIAN-RONG,DOU YOU WEI,WANG JIN-HUI and CHEN YUN-HONG.MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-Si ALLOYS PREPARED BY-MECHANICAL ALLOYING[J].Acta Physica Sinica,1997,46(11):2250-2257.
Authors:ZHOU TIE-JUN  WANG DUN-HUI  ZHANG JIAN-RONG  DOU YOU WEI  WANG JIN-HUI and CHEN YUN-HONG
Abstract:Some Fe-Si alloys have been prepared using the mechanical alloying method. The structure of the obtained Fe-Si alloys is the same as that of the bcc α-Fe. The final powders mainly consist of some particles with a grain size from a few hundreds of nanometers to several microns,while these particles are composed of some subgrains with a microcrystalline size of about 15—20 nanometers. Their magnetic properties have also been investigated. The values of their specific saturation magnetization (σs) are slightly less than those of the corresponding single crystalline and polycrystalline Fe-Si alloys, while the values of their coercive force (Hc) are nuch higher than those of corresponding Fe-Si alloys in bulk. Their magnetic spectra are all relaxation type except for Fe75Si25, and the values of their μ′ and μ″ are comparable with those of the ferrite composite materials and, in their magnetizing process, the domain wall displacements are predominant.
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