Abstract: A critical attribute that contributes to the quality of an additive manufacturing process is the surface area of the feedstock raw material. Surface area gives information amount of surface available to interact with binders which can offer a prediction of how the powder will behave. However, due to advances in technology, there are different techniques available and regularly used in industry to determine surface area. In this study, we explore and compare three techniques used to determine surface area of common metal powders. These techniques are BET method by gas adsorption, air permeability method, and calculated method from particle size and density data. In addition, these techniques also provide additional useful information about the metal powders, including porosity, density, and particle size.
Authors: Jack G. Saad and Tony Thornton
Keywords: Particle Size Distribution, Surface Area, Material Characterization