Temperature Dependent Electrical Transport Properties of Ni-Cr and Co-Cr Binary Alloys

Abstract

The temperature dependent electrical transport properties viz. electrical resistivity and thermal conductivity of Ni10Cr90 and Co20Cr80 alloys are computed at various temperatures. The electrical resistivity has been calculated according to Faber‐Ziman model combined with Ashcroft‐Langreth partial structure factors. In the present work, to include the ion‐electron interaction, we have used a well tested local model potential. For exchange‐correlation effects, five different forms of local field correction functions due to Hartree (H), Taylor (T), Ichimaru and Utsumi (IU), Farid et al (F) and Sarkar et al (S) are used. The present results due to S function are in good agreement with the experimental data as compared to results obtained using other four functions. The S functions satisfy compressibility sum rule in long wave length limit more accurately as compared to T, IU and F functions, which may be responsible for better agreement of results, obtained using S function. Also, present result confirms the validity of present approach in determining the transport properties of alloys like Ni‐Cr and Co‐Cr.