X. Yuan, Xi'an Research Institute of Hi-Tech, Xi'an, China
the Submicron α-Fe/polyamine absorber composite coatings which properties were researched were fabricated by Cold spraying process. For the mixed particle, the tangent of permittivity loss angle, =0.1~0.15, is close to Submicron α-Fe particle. But, the magnetic loss angle tangent exists large change between the two specimen, =0.8~0.9, 0.2~0.3. This means it requires an appropriate technique to analyze the effect of polyamide fraction to the electronic and magnetic performance of submicron α-Fe. So, the composite coatings with dense, high bonding strength were fabricated. The experimental results of reflectivity coefficient show that the coatings absorbing performance increases when the mass fraction of polyamide is 30%, the top of reflectivity coefficient is 8dB. Then, the absorbing performance of coatings decreases when the polyamide increases. The microwave absorber mechanism of this two phase coatings is discussed with percolation theory.
Summary: the Submicron á-Fe/polyamine absorber composite coatings which properties were researched were fabricated by Cold spraying process. For the mixed particle, the tangent of permittivity loss angle, =0.1~0.15, is close to Submicron á-Fe particle. But, the magnetic loss angle tangent exists large change between the two specimen, =0.8~0.9, 0.2~0.3. This means it requires an appropriate technique to analyze the effect of polyamide fraction to the electronic and magnetic performance of submicron á-Fe. So, the composite coatings with dense, high bonding strength were fabricated. The experimental results of reflectivity coefficient show that the coatings absorbing performance increases when the mass fraction of polyamide is 30%, the top of reflectivity coefficient is 8dB. Then, the absorbing performance of coatings decreases when the polyamide increases. The microwave absorber mechanism of this two phase coatings is discussed with percolation theory.
