机械合金化-热压烧结制备金属间化合物Fe_3Si  

Preparation of Intermetallic Compound Fe_3Si with Mechanical Alloying and Hot-pressing Sintering

作　　者：陈站[1] 张晋敏[1] 赵清壮[1] 朱培强[1] 郑旭[1] 谢泉[1] 

机构地区：[1]贵州大学理学院新型光电子材料与技术研究所,贵州贵阳550025

出　　处：《材料科学与工程学报》2012年第3期442-448,482,共8页Journal of Materials Science and Engineering

基　　金：科技部国际合作重点资助项目(2008DFA52210);贵州省优秀科技教育人才省长基金资助项目(黔省专合字[2011]40号);贵州省自然科学基金资助项目(黔科合J字[2008]2002);贵州省国际合作资助项目(黔科合外G字[2009]700113);贵阳市科技局大学生资助项目([2010]筑科计合同);贵州大学引进人才资助项目(贵大人基合字[2009]002号)

摘　　要：采用机械合金化(MA)和真空热压烧结(HP)法制备金属间化合物Fe3Si。X射线衍射(XRD)、扫描电镜(SEM)、差热分析(DTA)和振动样品磁强计(VSM)分别用于分析化合物的物相、显微形貌、致密度和磁学性质。研究表明球磨55h可达到完全合金化,Si溶入Fe中形成饱和固溶体α-Fe(Si),晶粒尺寸约7～8nm。热压烧结后,α-Fe(Si)固溶体发生有序转变生成Fe3Si。磁性能测量表明:样品的矫顽力随烧结温度的升高而减小;随烧结时间的延长而减小;饱和磁化强度随烧结时间的延长而增大。Intermetallic compound Fe3Si was prepared by mechanical alloying（MA） and hot-pressing sintering（HP）.Phase formation,micrograph,tightness and magnetic properties were investigated by X-ray diffractiometry（XRD）,scanning electron microscopy（SEM）,differential thermal analysis（DTA）,and vibrating sample magnetometry（VSM）,respectively.The results show that saturated solid solution alloy α-Fe（Si） formed through Si atoms entered into Fe lattice after 55 h of ball milling and grain size is about 7-8 nm.Ordered change will be happened and the solid solution α-Fe（Si） changed into intermetallic compound Fe3Si after hot-pressing sintering process.VSM results indicate that coercive force of sample decreases with the increase of the sintering temperature.Coercive force decreases,but saturation magnetization increases with increasing sintering time.

关 键 词：金属间化合物Fe3Si 机械合金化 热压烧结 

分 类 号：TN304.2[电子电信—物理电子学]