磁场对无掩模定域性电沉积-增材制造三维微结构生长模式的影响  

Effects of Magnetic Fields on Growth Pattern of Three-dimensionalMicrostructures in MLED-AM

作　　者：吴蒙华 姜炳春[1] 肖雨晴 贾卫平[2] WU Menghua;JIANG Bingchun;XIAO Yuqing;JIA Weiping(School of Mechanical and Electrical Engineering,Guangdong University of Science and Technology,Dongguan,Guangdong,523083;School of Mechanical Engineering,Dalian University,Dalian,Liaoning,116622)

机构地区：[1]广东科技学院机电工程学院,东莞523083 [2]大连大学机械工程学院,大连116622

出　　处：《中国机械工程》2024年第11期2035-2042,共8页China Mechanical Engineering

基　　金：国家自然科学基金(51875071);广东省普通高校科研重点专项(2023ZDZX3048)。

摘　　要：为研究磁场对无掩模定域性电沉积增材制造(MLED-AM)金属三维微结构生长模式的作用,以制备直径为50μm、长径比为10∶1的微镍柱为例,在MLED-AM过程中分别施加一定强度且与电场作用方向相同的顺向磁场和与电场作用方向相反的逆向磁场,通过对比实验探讨磁场对微镍柱平均体积沉积速率、表面形貌及晶粒尺寸的影响规律。实验结果表明,相较于无磁场作用,磁场作用可提高MLED-AM的平均体积沉积速率、细化沉积体的平均晶粒尺寸,且逆向磁场的作用更加显著(平均体积沉积速率提高25%~50%,平均晶粒尺寸达31.52 nm);同时,磁场作用可在一定程度上改善微镍柱的表面形貌,且顺向磁场作用的效果更好。根据实验结果及分析,逆向磁场作用对MLED-AM效率与质量的影响更大。Magnetic fields of certain strength,in the same and opposite directions to the electric field(that is,cis and reverse magnetic fields),were applied for exploring the influences of magnetic field on growth pattern of three-dimensional nickel microstructure in the MLED-AM processes.A comparative study of the average volumetric deposition rate,surface morphology and grain size during MLED-AM without and with two directions of magnetic field actions was carried out by taking micro-nickel pillars with diameter of 50μm and aspect ratio of 10∶1 as an example.The experimental results show that the action of magnetic fields may increase the average volumetric deposition rate and further refine the grain size of sedimentary bodies compared to no magnetic field action,and the effects of reverse magnetic field are more significant(the average volumetric deposition rate is increased by 25%~50%and the average grain size may reach 31.52 nm).Meanwhile,the action of magnetic fields may improve the surface morphology of micro-nickel pillars prepared by MLED-AM to a certain extent,and the effects of cis magnetic field are better.According to the experimental results and analysis,the reverse magnetic field has a greater impact on the efficiency and quality of MLED-AM.

关 键 词：磁场 无掩模定域性电沉积 增材制造 三维微结构 生长模式 

分 类 号：TQ153[化学工程—电化学工业]