Influence factors of the properties of amorphous alloy filler and its electromagnetic shielding coating

Soft magnetic amorphous alloy has attracted more and more attention in the field of electromagnetic shielding due to its excellent magnetic properties, corrosion resistance and mechanical properties. In this paper, the structure and performance of amorphous alloy are briefly introduced. The influence factors of magnetic properties and corrosion resistance of soft amorphous alloy are systemically summarized. Also, the influencing factors of electromagnetic shielding effectiveness of the coating and their effects were addressed extensively from the angle of developing electromagnetic shielding composite coating using soft magnetic amorphous alloy as filler. Based on literatures, the improvement of soft magnetic properties and electromagnetic shieldingeffectiveness of the amorphous alloy can be achieved by strengthening amorphous forming ability, enhancing corrosion resistance and refine grains. Appropriate addition of alloy element, surface modifications or a double decked structure is effective to improve electromagnetic shieldingeffectiveness. Moreover, for the electromagnetic shielding composite coating, the electromagnetic shielding effectiveness can be raised by a good conductive network constructed with flaky powders and a good match between the filler and coupling agent. Based on the review, some developing trends are postulated at last.