abstract
- © Published under licence by IOP Publishing Ltd.Numerical and approximate analytical solutions for the compact layer growth kinetics in a pure iron solid cylinder, during a plasma nitriding process, are obtained. The numerical simulations of the model are performed by using a front tracking finite difference scheme and the heat balance integral method. We propose a model where the main assumption is to consider a diffusion zone of constant thickness, which is solved for cylindrical symmetries. We present results for the time evolution of the compound layer, where the obtained solutions from both methods are consistent with the expected behaviour in the asymptotic time limit and experimental data from other authors.