Nanocomposite powder for powder-bed-based additive manufacturing obtained by dry particle coating

Several dry processing techniques are assessed to elaborate metallic nanocomposite powders dedicated powder-bed-based (PBB) additive manufacturing as laser-powder bed fusion (L-PBF) and Binder Jetting (BJ). Electrostatic assembly of nanosized silicon carbide (35 nm) particles at the surface gas atomized aluminium (15-53 ?m) is performed using mixers covering a range mixing energy from rotative drum mixer high such shear paddle acoustic mixers. Analyses particle size distribution (PSD) mixtures show that only high-energy bring monomodal PSD describing complete electrostatic nanoparticles. Statistic image analysis confirms absence plastic deformation during mixing. The coating leads drastic increase starting host powder flowability apparent density, while reducing optical reflectivity. Finally, oxidation SiC nanoparticles affects efficiency.