Abstract
Neodymium-Iron-Boron (NdFeB) permanent magnets are essential components in many mechanical, electric and electronic devices, providing large magnetic fields with no energy consumption. Nevertheless, their poor corrosion resistance is an important issue that makes them susceptible to degradation of the magnetic properties. In this paper, the authors propose the preparation of NdFeB – Poly-ether-ether-ketone (PEEK) composites, with the dual target of protecting the magnetic alloy, preventing it from corrosion, while realizing a new 3D printable material, to produce high performance magnets with customized and optimized design. PEEK – NdFeB filaments were produced with different filler amount (15, 34 and 41 vol%). 3D printed bonded magnets were successfully produced, resulting in magnetic remanence of 82, 218, and 226 mT respectively, as well as intrinsic coercivity of 627, 684 and 672 kA/m. The influence of the filler on the thermal and mechanical properties of the resulting composites were evaluated by means of several investigation techniques.
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