Densification behaviour and three-dimensional printing of Y2O3 ceramic powder by selective laser sintering

The selective laser sintering (SLS) of an yttria (Y2O3) ceramic powder was studied to understand both the effects i) initial particle characteristics on bed behaviour and ii) process conditions (laser power, scanning speed, hatching space) sintering/melting three-dimensionally printed objects. roughness bed, a sensitive indicator layer quality, determined through three-dimensional optical profilometry packing density modelled using discrete-element method. Complex shaped objects including spheres open rings were successfully fabricated by SLS printing. In addition, cube-shaped samples characterized X-ray diffraction electron microscopy. pore volume fraction significantly decreased from 41% without post-SLS heat treatment 31% with at 1750 °C for 20 h under secondary vacuum. Finally, anisotropy in elastic properties has been highlighted, Young's modulus reaches 11 GPa stiffest direction.