Abstract
A new atomization process, plasma atomization (P.A.), has been developed to produce fine, spherical powders. Unlike conventional high-pressure atomizers, PA utilizes multiple nontransferred direct-current arc plasmas to accelerate the atomization gas. In the P.A. process, metal wires are fed into the apex of the multiple plasmas, where they melt and are atomized in a single step. This process offers the unique ability to produce spherical powders of reactive metals with a typical average particle size of 40 μm.
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