Abstract
A laboratory apparatus was constructed to atomize metal alloys by forcing them through sintered ceramic disc filters. The process combines filtration of oxides and/or undesirable second phase particles with atomization. Sintered Al2O3 and SiO2 disc filters with average pore sizes in the range of 36 to 150 Μm were used. The effectiveness of various filters in removing “synthetic inclusions” from Al-Ti-B melts was studied. 2 to 10 Μm size TiB2 particles were successfully filtered out. Atomization experiments were done with pure aluminium and 7075 aluminium alloy. Spherical powders, 150 to 2000 Μm in size, of 7075 aluminium alloy with secondary dendrite arm spacings between 4 to 8 Μm, were cold compacted and extruded into a billet. Room temperature longitudinal properties of the billet in T6 condition were: YS 80×103 psi, UTS 94.3×103 psi, elongation 15% and R.A. 42%.
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Apelian, D., Flemings, M.C. & Mehrabian, R. A new process for atomization of metal alloys. J Mater Sci 10, 460–468 (1975). https://doi.org/10.1007/BF00543691
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DOI: https://doi.org/10.1007/BF00543691