Abstract: Based on technology of ultrasonication-aided spark discharge process, the growing process of Ni particles eroded by spark discharge on the bubble surfaces was investigated. The bubbles induced by spark discharge and ultrasonication-induced cavita-tion effect served as templates. The formation mechanism of Ni hollow microspheres by ultrasonication-aided spark discharge was interpreted through analyzing the morphology of samples from SEM. Nitrogen pycnometer density analyzer and tapping density analyzer were used to test the effective and tapping densities of each sample. The effect of ultrasonication on the hollow ratio of Ni particles was studied through comparing the change of effective density on different experimental conditions. The forming process of hollow spheres based on the theory of liquid phase base metal film was expounded. Meanwhile, the effect of ultrasonication on morpho-logy also was investigated through analyzing the values of tapping and losing density. Additional, the Hausner ratio was calculated to explain the liquidity of hollow particles. The results showed that the hollow ratio increase of 10%-20%, and the mobility of the particles was improved by applying ultrasonication.
1 Yang W D, Zhu D G. Preparation of superfine metal powders by spark erosion [J]. Equip Manuf Technol,2008(7):34(in Chinese). 杨文达, 朱德贵. 电火花放电腐蚀法制备超细金属粉体[J]. 装备制造技术,2008(7):34. 2 Zhang W, Ahmad F, Wang W. Generating silicon nanoparticles using spark erosion by flushing high-pressure deionized water [J]. Mater Manuf Process,2016,31:113. 3 Kuang Y, Guo Y H. Progress on the preparation and application of hollow microspheres [J]. Chin J Colloid Polym,2007,25(3):41(in Chinese). 匡毅, 郭艳华. 空心微球的制备及应用进展[J]. 胶体与聚合物,2007,25(3):41. 4 He J H, Chen H M, Zhang L. Inorganic hollow micro/nanospheres [J]. Prog Chem,2007,19(10):1488(in Chinese). 贺军辉, 陈洪敏, 张林. 无机微/纳空心球[J]. 化学进展,2007,19(10):1488. 5 Chen X T, Zhou G Y, Deng Z Y. Preparation and application progress of inorganic hollow micro／nanospheres [J]. Guangzhou Chem Ind Technol,2010,38(9):22(in Chinese). 陈兴田, 周国永, 邓志勇. 无机微/纳空心球材料的制备及应用进展[J]. 广州化工,2010,38(9):22. 6 Liu L, et al. Study on the surface erosion route to the fabrication of TiO2 hollow spheres [J]. Appl Surf Sci,2010,256(8):2596. 7 Wang J, Wen Y H, Li X L, et al. Study of preparation of hollow Ni particles by Si powder-mixed spark erosion [J]. J Funct Mater,2008,39(12):2106(in Chinese). 王京, 文玉华, 李翔龙, 等. 混Si粉电火花腐蚀制备中空Ni粉的研究[J]. 功能材料,2008,39(12):2106. 8 Song H W, Li X L, Zhang C. Technical study and analysis of hollow micro-nanospheres produced by EDM [J]. Mod Manuf Eng,2011(11):98(in Chinese). 宋宏伟, 李翔龙, 张楚.火花放电制备微纳空心球粉的工艺研究及分析[J]. 现代制造工程,2011(11):98. 9 Liu Y F, Li X L, Liu N, et al. Study of preparation method of micro-nano hollow Ni sphere based on TRIZ [J]. J Machine Des,2013,30(5):64(in Chinese). 刘一凡, 李翔龙, 刘南, 等. 基于TRIZ理论的微纳空心镍球的制备方法[J]. 机械设计,2013,30(5):64. 10 Hu L J,Li Y ,Li X L, et al. Study of preparation method of nanometer-sized hollow nickel spheres based on substance-field model[J]. J Eng Des,2013,20(3):180(in Chinese). 胡连军, 李彦, 李翔龙, 等. 基于物-场模型的纳米空心镍球的制备方法研究[J].工程设计学报,2013,20(3):180. 11 Liu N, Li X L, Liu Y F, et al. Discussion of the influence of the dielectric fluid on the process of the micro-nanospheres produced by EDM with USM[J]. Mod Manuf Eng,2013(11):16(in Chinese). 刘南, 李翔龙, 刘一凡, 等. 电火花-超声复合加工制备微纳空心球的影响因素探讨[J]. 现代制造工程,2013(11):16. 12 Wang Y T, Li X L, Liu Y F, et al. Effect of non-electrical parameters on the size of nickel microspheres produced by an ultrasound-aided electrical discharge machining[J].Chin J Mech Eng,2015,51(11):195(in Chinese). 汪衍涛, 李翔龙, 刘一凡, 等. 电火花-超声复合加工法制备镍微球时非电工艺参数对镍微球尺寸的影响规律[J]. 机械工程学报,2015,51(11):195. 13 Liu Y F, Li X L, Bai F S, et al. Effect of system parameters on the size distributions of hollow nickel microspheres produced by an ultrasound-aided electrical discharge machining process[J]. Particuology,2014(17):36. 14 Jia T, Jun N, Albert J S. Modeling of the anode crater formation in electrical discharge machining[J]. J Manuf Sci Eng,2012,134:1. 15 赵万生. 先进电火花加工技术[M]. 北京:国防工业出版社,2003. 16 Dibitonto D D, Eubank P T, Atel M R, et al. Theoretical models of the electrical discharge machining process. Ⅰ. A simple cathode erosion model [J]. Appl Phys,1989,66:4095. 17 Hui H L. Experimental study on technology of micro-bubble jet foam [D]. Beijing:China University of Petroleum,2011:30(in Chinese). 惠恒雷. 射流发泡制造微气泡技术试验研究[D]. 北京:中国石油大学,2011:30. 18 Shervani T, Mohammad T, Abdullah A, et al. Numerical study on the dynamics of an electrical discharge generated bubble in EDM[J]. Eng Anal Boundary Elements,2006,30(6):503. 19 胡传锦, 张富琦. 材料电火花腐蚀过程和几点新现象[C]∥第五届全国电加工学术年会论文集.南京,1986. 20 Marinescu N, Ghiculescu D. Life duration of gas bubble formed around plasma channel at ultrasonic aided electro discharge machining[J]. Ann DAAAM Proc,2009,495(2):1. 21 Shervani T M, Raghsoudi F, Shabgard M, et al. Numerical study on the dynamics of an electrical discharge generated vapor bubble in EDM with different shapes of the tool and the work piece[J]. Int J Adv Manuf Technol,2011,56(1):151. 22 Shervani T M, Mobadersany N. Numerical study on the hydrodynamic behavior of the dielectric fluid around an electrical discharge generated bubble in EDM[J]. Theor Comput Fluid Dynam,2013,27(5):701. 23 Shervani T M,Maghsoudi K. Numerical study on the splitting of a vapour bubble in the process of EDM [J]. Int J Adv Manuf Tech-nol,2008,38(7):657. 24 Fang Z N. Study on the formation mechanism and the mechanism of surface roughness of metal thin films on liquid substrates AFM [D]. Hangzhou:Zhejiang University,2009(in Chinese). 房正浓. 液相基底表面金属薄膜的形成机理和表面粗糙机制的AFM研究[D]. 杭州:浙江大学,2009. 25 Wang T F. Simulation of bubble column reactors using CFD coupled with a population balance model [J]. Front Chem Sci Eng,2011,5(2):162.
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2017, Vol. 31 
