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De-mixing of Al-Cu-Mg-Ti powder mixtures, under variation of particle size, obtained from vibrated test tubes, constant powder composition 92.4 wt% Al, 4 wt% Cu, 3 wt% AlMg50, 0.14 wt% Ti6Al4V, and 0.3 wt% SiOx; dominating factor for stability is Al particle size < 20 µm.
