Abstract
A novel powder extrusion technique was presented for processing metallic short fibers from their powders mixed with a fiber forming agent. The fiber forming agent is expected to prevent bonding between each powder particle during extrusion, while it elongates uniformly with the metal powder and is easy to remove from the extruded bar to recover the metallic fiber. When sodium chloride was mixed to over 93vol% in the aluminum powder, aluminum short fiber with smooth surface appearance was successfully fabricated by extrusion at 723K with an extrusion ratio of 17.6 (partially 100) followed by desalination in water. Decrease in sodium chloride addition into aluminum powder below 90vol% tended to produce rather long but branched aluminum fiber and the recovery rate decreased.
