高能球磨法制备FeSiAl纳米晶合金粉  

Preparation of FeSiAl Nanocrystalline Alloy Powders by High Energy Ball Milling

作　　者：孙怀涛[1] 方莹[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《机械工程材料》2008年第7期1-4,共4页Materials For Mechanical Engineering

摘　　要：用高纯氩气保护的室温球磨技术制备了FeSiAl纳米晶合金粉末;用XRD对原料粉末的合金化过程及合金粉末粒径和微观应变随球磨时间的变化进行了研究;用SEM、DSC对制得的FeSiAl纳米晶合金粉末的显微形貌及固态相变进行了研究。结果表明:在球磨初始的冷焊阶段,硅、铝原子就已经进入铁的晶格形成间隙固溶体,随着球磨时间的增加合金粉末微观应变增加、平均粒径迅速减小,球磨40 h后获得的合金粉末的平均粒径达到9 nm左右;球磨过程中形成的大量晶格畸变、微观应变等因素降低了合金粉末的相变温度,并使合金粉末处于不稳定能态。FeSiAl nanocrystalline alloy powders were prepared by mechanical milling in inert atmosphere of argon at room temperature.The effects of alloying process on grain size and micro strain of the alloy powders were investigated by XRD.The micro images and solid phase transformation of the nanocrystalline powders were studied by SEM and DSC.The results show that Al and Si atoms have intermingled with the crystal lattice of Fe and formed solid solution during the cold welding.With the increase of the milling time...

关 键 词：高能球磨 FeSiAl合金 纳米晶 相变 

分 类 号：TB381[一般工业技术—材料科学与工程]