Sm5Fe80Cu1Zr3.5Si5B3C2.5非晶合金晶化动力学的研究

稀有金属材料与工程, 2008, 37(6): 975-979.

Sm5Fe80Cu1Zr3.5Si5B3C2.5非晶合金晶化动力学的研究

陈良辅 ^1, , 葛洪良 ^2, , 张朋越 ^3, , 卢艳辉 ^4,

1.中国计量学院,浙江省磁学重点实验室,浙江,杭州310018

2.中国计量学院,浙江省磁学重点实验室,浙江,杭州310018

3.中国计量学院,浙江省磁学重点实验室,浙江,杭州310018

4.杭州富沃德电子电器有限公司,浙江,杭州,311305

基金项目: 浙江省科学计划项目(2006C14014)

关键词：非晶合金 , 纳米复合永磁材料 , 晶化动力学 , α-Fe/Sm2(Fe,Si)17Cx

Crystallization Kinetics of Amorphous Sm5Fe80Cu1Si5Zr3.5B3C2.5 Alloy

利用X射线衍射、透射电镜、振动样品磁强计和差热分析研究了非晶Sm5Fe80Cu1Zr3.5Si5B3C2.5合金中α-Fe/Sm2(Fe,Si)17Cx复合纳米相结构的形成过程、磁性及其晶化动力学.XRD结果表明,随着退火温度的升高,Sm5Fe80Cu1Zr3.5Si5B3C2.5非晶合金先后析出软磁相α-Fe和硬磁相Sm2(Fe,Si)17Cx;当经高温750℃晶化退火后,经Scherrer计算得到合金中α-Fe相和Sm2(Fe,Si)17Cx的晶粒尺寸分别为65.5和22.1nm,其矫顽力增加到58.11kA/m,剩磁为0.967T.晶化动力学分析发现,这种具有较低初始晶化激活能和阶段生长激活能的晶化行为是导致α-Fe相晶粒生长过于粗大和合金中α-Fe和Sm2(Fe,Si)17Cx复合纳米磁体磁耦合性能较差的根本原因.

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