ABSTRACT

Selective Laser Sintering (SLS) is an accepted and improving technique for additive manufacturing in many different areas, from the applications of aerospace to automotive, consumer products to dental and medical materials. Lightweighting is a significant issue, especially in terms of the automotive and aerospace industries, mainly to increase fuel efficiency and reduce CO₂ emission. The density reduction can be obtained by the addition of Hollow Glass Microspheres (HGMs) to Polyamide 12 (PA 12) polymer matrix. This study covers the different amounts of HGM filled PA 12 productions by SLS method and final structure characterization of PA 12-HGM composites. According to the performing thermal, physical, and mechanical tests, on increasing the amount of HGM in the structure, 10, 15, 20 weight percentages, respectively, the density of composites has been reduced significantly up to 20% for 20% of HGM filled PA 12 (PA 12–20HGM) composite, besides having a substantial rise in E-modulus.

摘要

选择性激光烧结 (SLS) 是一种被广泛接受和改进的增材制造技术，适用于许多不同领域，从航空航天到汽车、消费品到牙科和医疗材料的应用。轻量化是一个重要问题，尤其是在汽车和航空航天工业方面，主要是为了提高燃油效率和减少 CO ₂排放。可以通过将中空玻璃微球 (HGM) 添加到聚酰胺 12 (PA 12) 聚合物基质中来降低密度。本研究涵盖了通过 SLS 方法生产的不同量 HGM 填充 PA 12 和 PA 12-HGM 复合材料的最终结构表征。根据进行的热、物理和机械测试，在结构中分别增加 10、15、20 重量百分比的 HGM 时，复合材料的密度显着降低了 20%，HGM 填充量为 20% PA 12 (PA 12–20HGM) 复合材料，除了 E 模量显着增加。