摘要
高能球磨气雾化水收集的Fe78.4Cu0.6Nb2.5Si9.5B9软磁合金粉末,采用扫描电镜(SEM)和X射线衍射仪(XRD)分析球磨粉末的晶体结构及微观应变,采用振动样品磁强计(VSM)测试球磨粉末的磁滞回线。结果表明,未经球磨的Fe78.4Cu0.6Nb2.5Si9.5B9合金粉末形状多为球形或椭球形,平均粒径为93.02μm,主要物相为α-Fe(Si)相和少量非晶相;随球磨时间延长,粉末的扁平率增大,粒度减小;晶格微观内应变增大,晶格畸变加剧,非晶含量增加;α-Fe(Si)相对应的(110)峰宽化,(200)和(211)峰的强度减弱,且整体向小角度方向偏移;α-Fe(Si)相的晶面间距增大;粉末的饱和磁感应强度Bs基本不变、矫顽力Hc增大。综合可得,过度球磨不利于材料磁损耗性能的提高。
The crystal structures and microstrains of milled gas atomization Fe78.4Cu0.6Nb2.sSi9.5B9 soft magnetic alloy powders were investigated via the scanning electronic microscope （SEM） and X-ray diffraction （XRD）. The magnetic properties of those powders were studied by vibrating sample magnetometer （VSM）. The results show that the atomization powders almost exhibit spheric or ellipsoidal shape. The averaged particle size is 93.02 μm. The main phases are component with α-Fe （Si） and some amorphous phases. With increasing the ball milling time, the interplanar space, amount of amorphous, crystal microstrain and lattice distortion of the powders increase and the grain size decreases. The peak corresponds to the （110） plane of a-Fe （Si） phase becomes diffuse, and the peaks correspond to （200）, （211） planes become weak. All of these three peaks move back to small angle direction. Meanwhile, the saturation magnetic induction of the powders is almost unchanged and the coercivity of the powders increases. In short, overabundant ball milling is disadvantageous to the improvement of the material＇s magnetic wear.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2013年第2期211-216,共6页
Materials Science and Engineering of Powder Metallurgy
基金
中南大学粉末冶金国家重点实验室开放基金
关键词
雾化粉末
高能球磨
磁性能
结构
atomization powder
high energy ball milling
magnetic property
structure
