✍ Scribed by L. Salgado; F. Ambrózio Filho; M.D.M. das Neves; E.J.G. Pola; O.C. de Souza
No coin nor oath required. For personal study only.
The atomization techniques is an extensive way for producing rapidly cooled metal powders. This paper presents an experimental study of some process parameters on the powder properties of a 70 wt.% Ni-30 wt.% Cu alloy. The experimental procedures utilized and the experimental results are presented. Water and air were used as atomizing fluids. The atomizing fluid pressure and the melt pouring temperature were also changed. The following powder characteristics were measured: particle shape and particle size distribution, loss of H2, apparent density and flowability, and particle microstructure. The powder characteristics are correlated with the process parameters. As was expected, water promotes a greater cooling rate than air in the atomizer and particle shape changes were also noted. An increase in the melt pouring temperature and fluid pressure changes the particle size distribution with a decrease in the mean particle size.
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