Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

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3D Printing of Highly Pure Copper (2019, background): “Binder jetting (BJ) is a 3D printing process in which one or two inkjet printheads are used to selectively deposit a liquid binding agent on the top of a powder bed to join powder materials [21,80,81].”
A review of additive manufacturing of ceramics by powder bed selective laser processing (sintering / melting): Calcium phosphate, silicon carbide, zirconia, alumina, and their composites (2021, background): “Improving the packing density, by using bimodal powder mix tures, may also improve the flowability, the sintered density and, in some cases, reduce shrinkage [134].”
A review on recent developments in binder jetting metal additive manufacturing: Materials and process characteristics (2019, methodology): “In additional works, di ﬀ erent bimodal powder mixtures were tried in order to increase powder packing density and thus ﬁ nal part density [55,45].”
Metal Binder Jetting Additive Manufacturing: A Literature Review (2020, background): “One of the effective solutions is to increase the green density by employing multimodal powders [9, 61, 63, 68, 173].”