Effect of Carbonyl Fe Content on Electromagnetic Shielding Property of Al/Fe Composites
Aluminum iron composites were prepared by powder extrusion technology.The magnetic conductivity and wave absorption of the material were improved by adding the magnetic wave absorption material-carbonyl iron powder,and then the effective attenuation of the electromagnetic wave was realized.The results show that,with the increase of carbonyl Fe content,the tensile strength of Al-Fe composites increases and reaches the maximum of 166.7 MPa.The shielding efficiency of the material to the electromagnetic wave increases obviously with the increase of the carbonyl iron content.Among them,Al/10wt％Fe composite has the best electromagnetic shielding efficiency and the highest magnetic permeability,its electromagnetic shielding value is 120 dB,and the absorption shielding efficiency accounts for 83.3％.The magnetic conductivity is more than three times of that of pure aluminum.
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