Centrifugal hydraulic method of melt disintegratio. II. Effect of the physicochemical properties of metallic melts on the particle size of powders

Conclusions Lowering the surface tension of the melt leads to a decrease in the mean powder particle size. By adding a small amount (0.5%) of a surface-active agent to the melt, it is possible to substantially increase the yield of fine powder fractions. Lowering the viscosity of the melt, e.g., by superheating it by 10–20% above its melting point, enables the mean powder particle size to be decreased by a factor of 1.5–2. Powders of smaller particle size can be produced by using atomization injectors made of materials exhibiting lower adhesional activity toward melts. CHA of melts of lower density results, other things being equal, in the formation of finer powders.Translated from Poroshkovaya Metallurgiya, No. 9(321), pp. 10–14, September, 1989.