The Effects of Content and Surface Modification of Filler on the Mechanical Properties of Selective Laser Sintered Polyamide12 Composites

In selective laser sintering, the mechanical properties of the sintered part are largely influenced by many factors such as powder material, processing parameters, fabrication position and orientation. the present paper investigates the influence of content and surface modification of glass beads on the mechanical properties. the aim is particularly to better understand the effect of coupling agents on the mechanical properties of laser sintered parts. the specific material of interest is polyamide 12 filled with two types of a-glass beads. the production of test specimens is carried out on a dtm sinterstation 2000 machine. quasi-static mechanical tests are used to examine the mechanical properties of selective laser sintered specimens. the results show that adding glass beads (coated/ un-coated) to polyamide 12 improves the tensile strength and elastic modulus but reduces the impact strength and ductility of the sintered parts.