作　　者： ; ; ; ;

机构地区： 四川大学材料科学与工程学院

出　　处： 《功能材料》 2008年第12期1965-1967,共3页

摘　　要： 采用电弧熔炼的方法制备了具有一级磁晶相变Gd5Si1.8Ge1.8Si0.4母合金,然后在不同时间条件下对其进行高能球磨,并研究球磨时间对该磁热合金的磁性能及相组成的影响。粉末XRD结果显示球磨没有改变Gd5Si2Ge2相,但拓宽了相应的布拉格衍射峰,这表明球磨后的合金的晶粒尺寸较小。另外,球磨后的合金中形成了一些非晶相。随着晶粒尺寸和磁畴的减小,与母合金相比,希望其滞后现象减小。 The master Gd5Si1.8Ge1.8Si0.4 alloy with first order magnetic-crystallographic transition （FOMT） was prepared by the arc-meh method. Subsequently, the alloy was high-energy ball milled for different time. The effect of milling time on the magnetic properties and phase formation of the MCE alloy was investigated. According to powder XRD results, the ball milling technique does not change the Gd5 Si2 Ge2-type phase but broaden the corresponding Bragg reflection which implies the smaller crystalline size of milled alloys. In addition, some non-crystalline phase is formed in each milled alloy. With the decrease of the crystalline size and magnetic domain, the hysteresis of the alloy is expected to reduce compared with that of the master alloy.

关 键 词： 磁热材料 高能球磨 磁性能 相组成 合金

领　　域： [一般工业技术] [电气工程] [一般工业技术]