20.500.12556/DKUM-91500 Comparative analysis of a 3D printed polymer bonded magnet composed of a TPU-PA12 matrix and Nd-Fe-B atomised powder and melt spun flakes respectively The present study reports the development of new polymer bonded magnet containing a Thermoplastic Polyurethane (TPU) – Nylon (PA12) blend as the matrix material and Nd-Fe-B magnetic particles. Two composite materials were explored: one using Nd-Fe-B atomised spherical powder (ASP) and another incorporating Nd-Fe-B melt-spun flakes (MSF). The filaments were formulated by blending TPU, PA12, and one of selected type of Nd-Fe-B particles using a mixing device. The ASP and the MSF were integrated into the matrix via a precise compounding process and 3D printing was used to produce the testing specimens. The preliminary findings indicate that both formulations exhibited promising magnetic properties while maintaining the mechanical characteristics of TPU and PA12. The atomised spherical powder formulation demonstrated worse magnetic behaviour compared to the melt-spun flake formulation. ASP particles enable better fluidity of the composite material during 3D printing. However, the close-packed arrangement of these particles is the cause of much higher porosity and consequently the poorer mechanical and magnetic properties. Optimization of the processing parameters showed significant influence on the final magnetic performance and structural integrity of the printed specimens. bonded magnets Nd-Fe-B melt spun flakes Nd-Fe-B atomised powders material extrusion additive manufacturing fused specimen fabrication plastomagneti Nd-Fe-B atomizirani praški iztiskanje materiala dodajalne tehnologije izdelava taljenega vzorca true false true Elsevier Angleški jezik Slovenski jezik https://www.sciencedirect.com/journal/journal-of-materials-research-and-technology © 2024 The Authors Članek v reviji 2025-01-08 14:46:22 2025-01-08 14:46:22 2026-01-20 07:18:07 0000-00-00 00:00:00 2025 0 0 str. 748-760 Vol. 34 January–February 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-12-10 2024-12-11 2024-12-12 669.1:681.5 221399811 10.1016/j.jmrt.2024.12.090 2238-7854 1-s2.0-S2238785424028941-main.pdf 1-s2.0-S2238785424028941-main.pdf 1 50D6CFFD4FD0DBAC88E8452BAEC7C909 f3eab5bd1d00b1a19e4a83b2efe0b421246f5cd3d0b9f6c96d8471414266e5d7 177056d4-cdc8-11ef-9362-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187697 https://www.sciencedirect.com/science/article/pii/S2238785424028941?ref=pdf_download&fr=RR-2&rr=8feca5bd5d9d0e73 0 2a65293a-cdc8-11ef-9362-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187698 Fakulteta za strojništvo 0 0 0