Speaker
Description
The use of additive techniques to shape polymer-bonded composites has become popular. Mixing the polymer with the metal powder makes it possible to obtain various new materials with different properties. One possible solution is to make composites based on magnetic powders in a low-density polyethylene (LDPE) matrix. Mixing process results in a bonded magnetic material with reduced magnetic properties compared to solid materials. However, the encapsulation of the powder in a polymer matrix allows it to be protected from environmental influences (oxidation). In addition, additive techniques make it possible to form magnetic cores of almost any shape without the need for sintering and electroplating.
The article is dedicated to discussing the process of manufacturing cores based on magnetic powders using additive manufacturing techniques ($3$D printing). The base magnetic powder was hot-mixed with LDPE. Once the homogeneous mass was obtained, the filament required for additive techniques was produced. Using a $3$D printer popular for FFF (Fused Filament Fabrication) techniques, core rings were made to measure the magnetic properties of this type of material. The magnetic properties of the manufactured cores were compared as a function of the percentage of base magnetic powder content. At the same time, the influence of the powder content on the manufacturing process by additive techniques was taken into consideration. The analysis carried out made it possible to identify the optimum parameters for the manufacturing process, including the optimum content of magnetic powder in the composite material.
Acknowledgements
This work was supported by the Warsaw University of Technology, Poland, through the Excellence Initiative Research University program, project number CPR-IDUB/227/Z01/2024.
