Impact and magnetic properties of magnetic Fe-Si/epoxy composites

The magnetic composites were prepared by mixing bisphenols A WSR-615 and glycidyl amine AG-80 epoxy resins and a high content of Fe-Si magnetic particles using hot-pressing process. The glass transition temperature and impact property of the epoxy resins and the impact strength and magnetization of the composites were investigated as a function of Fe-Si content and temperature. It is shown that the impact strength and the magnetization of Fe-Si/epoxy composites increase with increasing the Fe-Si content and are enhanced from 4.03 kJ/m² and 162.07 emu/g to 7.16 kJ/m² and 175.04 emu/g at 54 vol% to 66 vol% Fe-Si particles. The impact strength and magnetization of the composites are very lightly sensitive to the temperature change from-60 ℃ to 140 ℃, which is desired for practical applications requiring that the mechanical and magnetic properties are stable as the temperature changes.