Spark-eroded particles: influence of processing parameters

2020-02-11 22:31:18

processing particles annealing spark configurations

责任者: Carrey, J.;Radousky, H.B.;Berkowitz, A.E. 单位: Center for Magnetic Recording Res., Univ. of California-San Diego, La Jolla, CA, USA 来源出处: Journal of Applied Physics(J. Appl. Phys. (USA)),2004/02/01,95(3):823-9 摘要: Ni particles were prepared by spark erosion in a fixed-gap apparatus, and in the usual shaker-pot assembly, in an investigation of the influence of various processing parameters on the particles properties. The sizes of the particles were studied as functions of spark energies ranging from 10 μJ to 1 J, and a scaling relation derived from a simple model was verified. Several different static and rotating electrode configurations were compared with respect to their suitability for producing significant yields of small particles. The advantages of stirring the dielectric with the fixed-gap apparatus and of rotating the electrodes were demonstrated. Water, kerosene, and liquid argon and nitrogen were used as dielectric liquids. When compounds were formed, the reaction with the dielectric proceeded inversely with particle size. Spark erosion in kerosene at low spark energies, followed by annealing, proved to be an effective method to produce fine nickel particles 关键词: annealing;nanoparticles;nickel;particle size;plasma materials processing;spark machining;wear;spark-eroded particles;processing parameters;Ni particles;spark erosion;fixed-gap apparatus;shaker-pot assembly;particles sizes;scaling relation;static electrode configurations;rotating electrode configurations;kerosene;annealing;Ni