Functional, thermal and rheological properties of polymer-based magnetic composite filaments for additive manufacturing

The design of functional composite filaments for fused filament fabrication requires a suitable polymer composition, functionality particles, uniform distribution fillers throughout the filament, and adequate printability. Uniform at predictable concentrations is achieved by designing polymeric capsules containing using them as feedstock extrusion. Functionality can be inferred from that particles target concentration. However, conditions printing strongly depend on type characteristics/concentration fillers. Soft magnetic were produced polylactic acid (PLA) filled with 30–52 wt. % maraging steel particles. Composite preserve soft character Fillers reduce transition temperatures ∼ 5 K have profound impact Rheological characterization shows “ball bearing effect” gas-atomized reduces viscosity composites more than one order magnitude, decreasing temperature 215 °C to 170 °C, associated lack agglomeration proposed production method. experiments allow detect required changes in without requiring an extensive costly trial error process large set parameters.