Powder Technology, Vol.381, 181-188, 2021
Use of titania powders in the laser sintering process: Link between process conditions and product mechanical properties
Selective Laser Sintering (SLS) of Titania powders is studied to understand how the initial material properties and the process conditions affect the degree of sintering/melting and the mechanical properties of the semi-3D artefact produced.Five samples with differing particle size were used to explore the feasibility of processing them by SLS. Laser power and scan speed were studied as process variables to assess and quantify the effect of their changes on the properties of product. The measured tensile strength was used in the equation for the strength of the powder's agglomerates developed by Rumpf, which allowed estimating the size of the sintered necks. The sintering temperature of each powder sample was determined experimentally and used to predict the size of the sintered neck for the different powder grain size using different literature models; these values were then compared with the values obtained from the experiments. (C) 2020 Elsevier B.V. All rights reserved.
Keywords:Selective laser sintering;Titania powders;Particle size distribution;Mechanical properties;Particle sintering model