Modeling of Magnetic Properties of Polymer Bonded Nd–Fe–B Magnets with Surface Modifications
Modeling of magnetic properties of polymer bonded Nd–Fe–B magnets with surface modifications
In this breakthrough led by Jun Xiao, Joshua U Otaigbe, and David C Jiles, researchers explored the transformative effects of coating magnetic powders with an organometallic compound on the performance of polymer-bonded Nd–Fe–B magnets. These magnets, blending polymer matrices and magnetic powders, offer cost-effective advantages and unique shaping possibilities compared to metallic or ceramic counterparts.
The study revealed that the coating significantly enhanced the magnets’ irreversible loss in flux and energy product, providing a protective shield against moisture and oxygen, particularly at high temperatures. Using a theoretical model based on energy balance during domain magnetization, researchers deciphered changes in magnetic properties, indicating that the coating treatment increased the remanence of polymer-bonded magnets by fostering better interaction among magnetic particles.
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