Binder Jetting Additive Manufacturing: Effect of Particle Size Distribution on Density

Abstract This paper reports a study on the effects of particle size distribution (tuned by mixing different-sized powders) density densely packed powder, powder bed density, and sintered in binder jetting additive manufacturing. An analytical model was used first to mixture packing density. Analytical results showed that multimodal (bimodal or trimodal) mixtures could achieve higher than their component powders there existed an optimal fraction maximum Both lower ratio (fine coarse) larger led A threshold for ratio, below which method not effective improvement. Its relationship calculated plotted. In addition, dependence These plots can be as theoretical tools select parameters method. Experimental tap were consistent with above-mentioned predictions. Also, experimental measurements distributions achieved most cases.