Infrared emittance of Nix-Cr1-x alloys

The purpose of this study was to investigate the relation between the infrared emittance (at 10 μm) and the alloy concentration for NixCr1-x and to find out if the Hagen-Ruben relation could be applicable to this system. The work showed that the Hagen-Ruben relation was valid for the nickel-rich fcc-phase alloys from 11-43% Cr. This indicates that intraband transitions dominate over interband transitions in the infrared wavelength range due to impurity scattering. It was also found that an integrated formulation of the Hagen-Ruben relation could be used for the integrated room temperature thermal emittance. A similar study has recently been performed on the CuyNi1-y fcc-phase system where the Hagen-Ruben relation was valid for both copper-rich and nickel-rich alloys