ABSTRACT

Selective Laser Sintering (SLS) is a widely used additive manufacturing (AM) technique for creating 3D geometries by adding materials in layers. Although neat polymer is mainly used in powder forms for production, organic or inorganic fillers can be added to produce polymer composites by SLS method. In this study, Polyamide 12 (PA 12) matrix composite parts filled with two different copper particles, dendritic and spherical shaped, were produced, and their mechanical, structural and electrical properties were investigated. The present study outlined that by increasing incident energy densities during sample fabrication, changes in mechanical and electrical characteristics were examined. The findings were analysed in terms of filler type and energy input, which were discovered to have a slight change in the bending behaviour of SLS components. Furthermore, the impact strength was shown to increase constantly with increasing energy density. Furthermore, whereas the electrical conductivity of spherical Cu-filled parts rose considerably, no significant change was seen in dendritic-shaped Cu-filled parts.

摘要

选择性激光烧结 (SLS) 是一种广泛使用的增材制造 (AM) 技术，用于通过在层中添加材料来创建 3D 几何形状。虽然纯聚合物主要以粉末形式用于生产，但可以添加有机或无机填料通过 SLS 法生产聚合物复合材料。在这项研究中，生产了填充有两种不同铜颗粒（树枝状和球形）的聚酰胺 12 (PA 12) 基复合材料零件，并研究了它们的机械、结构和电性能。本研究概述了通过在样品制造过程中增加入射能量密度，检查机械和电气特性的变化。根据填料类型和能量输入对研究结果进行了分析，发现它们对 SLS 组件的弯曲行为有轻微的变化。此外，冲击强度显示出随着能量密度的增加而不断增加。此外，虽然球形Cu填充部件的电导率显着上升，但在树枝状Cu填充部件中没有观察到显着变化。