文章基本信息

标题：Modeling of compound layer growth during nitriding of pure iron
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作者：Ernesto Manuel Hernandez ; Jose Antonio Otero ; Antonio Jimenez 等
期刊名称：Scientific Research and Essays
印刷版ISSN：1992-2248
出版年度：2016
卷号：11
期号：13
页码：135-146
DOI：10.5897/SRE2016.6405
语种：English
出版社：Academic Journals
摘要：This paper presents a physical model which describes the layer growth kinetics and the nitrogen concentration profiles during gaseous or plasma nitriding of pure iron. The model is related to a one dimensional moving boundary value problem where the initial concentration profiles are assumed to be linear and a new boundary condition at the diffusion zone is proposed. The model is solved by using a classical finite difference scheme (FDM-CS) and the Heat Balance Integral Method (HBIM). Due to the proposed boundary condition at the diffusion zone, the numerical solutions can be validated through a simple physical analysis of mass transport theory in the asymptotic time limit. The results obtained are compared, and observed to be in good agreement with available experimental data and other approximate solutions reported in the literature.
关键词：Advanced characterization; coatings; plasma nitriding; finite difference; heat balance