以Cu-Fe-Cr原位复合丝材萃取得微米级、亚微米级的Fe-Cr纤维,并研究了变形量、长期储存条件和热处理对Fe-Cr纤维样品结构和磁性能的影响. 采用X射线衍射(XRD)和扫描电镜(SEM)分析了样品的结构和形貌,采用振动样品磁强计(VSM)测试了样品的磁性,并利用热重-差热分析(TGA-DTA)比较了不同变形量的Fe-Cr纤维在空气中的热稳定性. 结果表明:随着变形量的增大和Fe-Cr纤维的细化,纤维的饱和磁矩基本恒定(约140A·m2/kg),而剩磁和矫顽力则逐渐增加;Fe-Cr纤维在无水乙醇和空气中储存一年以上,磁性基本保持不变;Fe-Cr纤维在空气中经300℃以上加热1h后,逐渐由铁磁性的α-(Fe,Cr) (BCC结构)固溶体转变为顺磁性的(Fe,Cr)2O3(六角晶系),饱和磁化强度显著下降;且随着变形量的增大,较细Fe-Cr纤维的热稳定性较差.
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