网状结构对Fe_(72)Y_6B_(22)非晶合金晶化行为和软磁性能影响的研究  

Role of net-like zones on the crystallization behavior and soft magnetic property of Fe_(72)Y_6B_(22) glassy alloy

作　　者：马海健[1,2] 王伟民[2] 潘少鹏[2] 张洪迪[2] 曹崇德[3] 

机构地区：[1]潍坊学院机电与车辆工程学院,潍坊261061 [2]山东大学材料液固结构演变与加工教育部重点实验室,济南25006 [3]西北工业大学理学院1西安710072

出　　处：《中国科学：物理学、力学、天文学》2012年第6期583-591,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:51171091;51171152);山东省杰出青年基金(编号:JQ201012)资助项目

摘　　要：对Fe72Y6822非晶合金的晶化行为和软磁性能进行了研究.分子动力学模拟结果显示,合金熔体中的团簇结构主要为<0,3,6,0>型多面体;实验结果显示,在合金的退火样品中存在由冠状三棱柱组成的网状结构.这种网状结构可提高合金在过冷液相区的热稳定性,抑制合金的晶化,改变合金的晶化方式,促进纳米α-Fe晶粒的形成.适当的退火工艺可以提高Fe72Y6822非晶合金的软磁性能.合金饱和磁化强度和矫顽力的变化是由于晶化过程的不同阶段析出纳米晶oc-Fe相、顺磁性的YB12相和弱磁性的Fe3B相所致.The crystallization behavior and soft magnetic property of Fe72Y6B22 glassy alloy have been investigated.It is shown that there exist net-like zones consisting of tri-capped triangular prisms in the annealed samples of Fe72Y6B22 glassy alloy.These net-like zones can improve the thermal stability of the supercooled liquid region and hence suppress the crystallization of Fe72Y6B22 glassy alloy.The net-like zones can change the crystallization mode of present glassy alloy and facilitate the formation of nanocrystalline α-Fe phases.It is found that the soft magnetic property of Fe72Y6B22 glassy alloy can be improved by proper annealing process.The difference in saturation magnetization and coercivity of the Fe72Y6B22 glassy/nanocrystalline alloys is ascribed to the precipitation of the nanocrystalline α-Fe phases,the paramagnetic YB12 phases and the weak magnetic Fe3B phases at different crystallization stages.

关 键 词：铁基非晶 晶化行为 软磁性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]