Balanced Fracturing and Cold-welding of Magnesium during Ball Milling Assisted by Carbon Coating:Experimental and Molecular Dynamic Simulation  

作　　者：韩宗盈 DONG Hui DING Guoyang ZHANG Jiale SONG Xiufang HAN Zongying;DONG Hui;DING Guoyang;ZHANG Jiale;SONG Xiufang(College of Energy Storage Technology,Shandong University of Science and Technology,Qingdao 266590,China;College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]College of Energy Storage Technology,Shandong University of Science and Technology,Qingdao 266590,China [2]College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第4期895-903,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Shandong Provincial Natural Science Foundation(No.ZR2022MB060);the Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team(Hydrogen Energy Chemistry Innovation Team)。

摘　　要：The lignite-derived carbon from self-protection pyrolysis was employed to balance the fracturing and cold-welding of magnesium during ball milling.Particle size analysis indicates that the introduction of lignite-derived carbon can effectively reduce the particle size of Mg while the introduction of graphite does no help.Besides,the effect of lignite-derived carbon on crystallite size reduction of Mg is also better than graphite.A moderate cold-welding phenomenon was observed after ball-milling Mg with the lignite-derived carbon,suggesting less Mg is wasted on the milling vials and balls.Molecular dynamic simulations reveal that the balanced fracturing and cold-welding of magnesium during ball milling is mainly attributed to the special structure of the lignite-derived carbon:graphitized short-range ordered stacking function as dry lubricant and irregular shape/sharp edge function as milling aid.The preliminary findings in current study are expected to offer implications for designing efficient Mg-based hydrogen storage materials.

关 键 词：MAGNESIUM lignite-derived carbon cold-welding ball milling molecular dynamic 

分 类 号：TD849.2[矿业工程—煤矿开采] TD921.4[矿业工程—矿山开采]