COMPARISON ON REFINEMENT OF IRON POWDER BY BALL MILLING ASSISTED BY DIFFERENT EXTERNAL FIELDS  

作　　者：L.Y.Dai B.Cao M.Zhu 

机构地区：[1]School of Mechanical Engineering,South China University of Technology,Guangzhou 510640,China [2]Marine Engineering Institute,Jimei University,Xiamen 361021,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2006年第6期411-417,共7页金属学报(英文版)

基　　金：This work was supported by the National natural Science Foundation(No.50371027);the team project from Natural Science Foundation of Guangdong Province and Natural Science Foundation of Fujian Province(No.E0440001).

摘　　要：The cryogenic milling and milling in conjunction with dielectric barrier discharge plasma (DBDP) have been separately set up. The combined effect of low temperature and plasma on ball milling has been investigated by examining the refinement of particle size and grain size of iron powder using scanning electron microscopy, X-ray diffraction, and small angle X-ray scattering. It was found that the mean size of iron particles could reach 104nm only after 10 hours of ball milling in conjunction with DBDP, whereas a minimum average grain size of 8.4nm was obtained by cryomilling at -20℃; however, it is difficult to refine the particle size and grain size under the same milling condition in the absence of DBDP and cryogenic temperature.The cryogenic milling and milling in conjunction with dielectric barrier discharge plasma (DBDP) have been separately set up. The combined effect of low temperature and plasma on ball milling has been investigated by examining the refinement of particle size and grain size of iron powder using scanning electron microscopy, X-ray diffraction, and small angle X-ray scattering. It was found that the mean size of iron particles could reach 104nm only after 10 hours of ball milling in conjunction with DBDP, whereas a minimum average grain size of 8.4nm was obtained by cryomilling at -20℃; however, it is difficult to refine the particle size and grain size under the same milling condition in the absence of DBDP and cryogenic temperature.

关 键 词：ball milling CRYOMILLING dielectric barrier discharge (DBD) NANOPARTICLE 

分 类 号：TG174[金属学及工艺—金属表面处理]