Effect of Additives and Print Orientation on the Properties of Laser Sintering-Printed Polyamide 12 Components

Polymers

Jana Petrů¹  Marek Pagáč¹  Lucie Zárybnická²  Pavel Krpec³ 

[1] Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-TU Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava, Czech Republic;Department of Technical Studies, College of Polytechnics Jihlava, Tolstého 16, 586 01 Jihlava, Czech Republic;V-NASS, A.S., Halasova 2938/1a, 703 00 Ostrava, Czech Republic;

关键词: powder bed fusion;    polyamide 12;    additives;    print orientation;    mechanical properties;   

DOI  :  10.3390/polym14061172

来源: DOAJ

【 摘 要 】

3D printing, also known as additive manufacturing, is becoming increasingly popular for prototype processing in industrial practice. Laser sintering, which is a laser powder bed fusion technique, is a versatile and common 3D printing technology, which enables compact and high-quality products. Polyamide 12, a popular 3D printing material, provides reliable mechanical and thermal properties. Weaknesses in applying this technology for polyamide 12 include incomplete information regarding the application of various types of additives and different printing orientations with respect to the properties. This study aimed to investigate the influence of various additives (including carbon fiber, glass fiber, flame retardant, and aluminum powder) combined with polyamide 12, using processing of predefined powder refreshing mixture on the properties of a finished product. The thermal, surface, and mechanical properties of samples printed with five different polyamides 12-based powders at three different print orientations were investigated. It was found that the inclusion of additives decreases the tensile strength and increases the surface roughness of printed components—however, the toughness increases. The results can assist designers in selecting an appropriate material that will produce a finished part with the required properties for a given application.

【 授权许可】

Unknown