Title: Mechanical Properties of Extruded PA12 and SrFe12O19 Filaments Via Twin-Screw Extrusion for Magnetic Field Assisted Fused Filament Fabrication

Authors: Mandesh Khadka, Md Javed Imtiaze Khan, Alireza Sargordi, Ryan Woods, Maria Camila Belduque C., and Jitendra S. Tate

DOI: 10.33599/nasampe/c.22.0136

Abstract: By fusing soft magnetic particles such as Strontium Ferrite (SrFe12O19) with polymers such as polyamides, soft magnetic composites can be fabricated, which applications include but are not limited to stators, low-speed rotors, AC permanent magnet motors, electronics, and sensors, among many others. The developed magnetic composite materials are low-cost, low-weight, and environmentally friendly due to the recyclability of both the magnetic fillers and the thermoplastic matrix. Strontium ferrite has a higher operating temperature of around 470 °C and it is easier to obtain compared to Neodymium Iron Boron (NdFeB) or other rare earth materials, which working temperatures are considerably lower and are highly expensive. Furthermore, SrFe12O19 anisotropic characteristics expand even further the potential uses of this material, for example, Halbach arrays. Polymer magnetic composites can be obtained through the fused filament fabrication process, one of the most common additive manufacturing methods. The filaments are obtained effectively using twin-screw extrusion. In this project, twin-screw extrusion is used to extrude composite filaments of 30wt% PA12 and 70wt% SrFe12O19. A Biaxial Vibrating Sample Magnetometer and an MTS 810 following ASTM standards are used to understand the magnetic and mechanical properties of the developed magnetic composite material, respectively. Additionally, TEM and SEM are used to understand the sample’s inner structure and its surface and composition respectively.

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Conference: CAMX 2022

Publication Date: 2022/10/17

SKU: TP22-0000000136

Pages: 19

Price: $38.00