Diffusion and electrotransport of carbon in γ-phase iron-nickel alloys Ijomah Ifeoma Agatha1, Nwoke Victor Ugochukwu1, Anene Franklin Amechi1, Aguh Patrick Sunday2, Daniel-Mkpume Cynthia Chikodi3 1Department Of Metallurgical Materials Engineering, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Anambra State, Nigeria 2Department of Industrial Production Engineering, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Anambra State, Nigeria 3Department Of Metallurgical and Materials Engineering, University of Nigeria, Nuskka Online published on 12 April, 2021. Abstract The diffusivity and electro transport behavior of carbon in an iron-32.5 wt pct nickel alloy was investigated for the temperature range of 1220 to 1415 K for two carbon concentrations. The electrical resistivity was measured as a function of temperature between room temperature and 1625 K for carbon contents of 0.002, 0.10, and 0.21 wt pct. Values for the activation energy for diffusion of 32.0 ± 5.8 and 36.0 ± 5.2 kcal per mole were determined for alloys containing 0,10 and 0.21 wt pct carbon respectively, with slightly smaller values being found for the activation energy for electro transport. The sign of the effective valence indicates that carbon migrates toward the cathode. Top |