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M. V. NOVIKOV, G. D. IL’NITSKA, G. P. BOGATYREVA, G. F. NEVSTRUEV, O. V. LESHCHENKO, and I. N. ZAITSEVA
«Metallic Micro- and Nanoparticles in Processes of Separation of Superhard-Material Powders»
PACS numbers: 61.43.Gt, 61.72.Mm, 62.20.Qp, 62.23.St, 68.35.Np, 81.05.uj, 81.07.Wx
Metal nano- and microparticles are used for separation of superhard material (SHM) crystals by degree of surface defectiveness. The surface defectiveness is closely related to crystal strength. Adhesive contact intensity in interaction of solid particles with surface of SHM powders can reach high values. Adhesion effect is used for the separation of SHM powders by degree of surface defectiveness and some other properties. For this goal, some micro- and nanoparticles of metal powder with certain pronounced properties (magnetic, electric, etc.) are fixed by adhesion to the surface of SHM grains. As a result, SHM grains get properties of ferromagnetic powder particles attached to the grain surfaces. New high-contrast properties provide conditions for selective separation of SHM powder grains in force field according to properties of ferromagnetic powder particles attached to grain surface into a number of powders differing in degree of grain-surface defectiveness. The results of studies of SHM grind-powder separation process with use of nano- and microparticles of ferromagnetic powders are presented in a given article.