Entropy-Based Approach to Describing Thermal Radiation of Solid Ni–Cr Alloy

An approach to describing the thermal radiation of solid alloys, using the Ni–Cr system as an example, is proposed employing normalized entropy S/R. The emissivity is calculated using the Foote approximation based on data for the resistivity in the temperature range 400–1400 K. The provided heat flux values are normalized by density and a scale parameter q₁^*. A universal exponential dependence between the logarithm of the normalized flux and the S/R value has been established, which is applicable for all considered Cr concentrations in the alloy. The high degree of correspondence (R2 = 0. 997) confirms the effectiveness of the entropy-based generalization and suggests its utility for estimating the radiative properties of alloys in the absence of direct experimental data.