Behavior of Fe Powder During High-Energy Ball Milling Cooperated with Dielectric Barrier Discharge Plasma  

作　　者：Leyang DAI 

机构地区：[1]Marine Engineering Institute, Jimei University

出　　处：《Acta Metallurgica Sinica(English Letters)》2013年第1期63-68,共6页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.51177008);Natural Science Fundation of Fujian Province(No. 2012J01228);the Program for New Century Excellent Talents in Fujian Province University (No. NCETFJ–Z80136);Fujian Provincial Department of Science & Technology (Nos. 2011J01324 and JK2010030)

摘　　要：In this study, nanostructured Fe powders were synthesized following 10 hours of high-energy ball milling with a superimposed dielectric barrier discharge plasma （DBDP）. The mean size of the milled powder was approximately 100 nm with an average grain size of 16.2 nm. The influence of DBDP on the underlying grain refinement mechanisms during ball milling was investigated by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and BET methods. Our results show that the Fe particles displayed an extraordinary plasticity during the early milling stages under the action of DBDP, and that the plastic deformation experienced by the Fe particles during this stage was more severe than that present in normal milling. A high concentration of spherical Fe particles, approximately 50-100 nm in diameter, was documented via TEM. We propose that these spherical particles were generated via high temperature disintegration as a result of DBDP electron bombardment during ball milling. Our results suggest that it may be possible to significantly refine metallic powders during milling via the superimposition of DBDP.In this study, nanostructured Fe powders were synthesized following 10 hours of high-energy ball milling with a superimposed dielectric barrier discharge plasma （DBDP）. The mean size of the milled powder was approximately 100 nm with an average grain size of 16.2 nm. The influence of DBDP on the underlying grain refinement mechanisms during ball milling was investigated by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and BET methods. Our results show that the Fe particles displayed an extraordinary plasticity during the early milling stages under the action of DBDP, and that the plastic deformation experienced by the Fe particles during this stage was more severe than that present in normal milling. A high concentration of spherical Fe particles, approximately 50-100 nm in diameter, was documented via TEM. We propose that these spherical particles were generated via high temperature disintegration as a result of DBDP electron bombardment during ball milling. Our results suggest that it may be possible to significantly refine metallic powders during milling via the superimposition of DBDP.

关 键 词：Dielectric barrier discharge plasma （DBDP） High-energy ball milling Nano-Fepowder Plastic deformation Elevated temperature disintegration 

分 类 号：TB383.1[一般工业技术—材料科学与工程]