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Numerical simulation of the growth of the γ’-iron nitride in NH3-H2-N2 gas mixture (570°C and 1 atm) (Part II)

Published online by Cambridge University Press:  24 June 2010

M. Rida  and
H. Tout
M. Rida
Affiliation:
Lebanese University, Faculty of Science (Section III), Department of physics, Tripoli, Lebanon
H. Tout
Affiliation:
Lebanese University, Faculty of Science (Section I), IT department, Beirut, Lebanon
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Abstract

The aim of this study is the control of the growth of the γ’-iron nitride layer during gas nitriding. We simultaneously simulated both the gaseous and solid phases as well as the development of the γ’-iron nitride layer on the α-iron nitride layer. The theoretical atomic nitrogen flux at constant superficial concentration was used as the boundary limit at the sample’s surface. Only using the input data, we obtained, as a function of the time, the atomic nitrogen profiles in the sample and the evolution of the γ’-iron nitride layer thickness. The numerical results favorably compare with the experimental ones.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 107 , Issue 4 , April 2010 , pp. 125 - 129
Copyright
© INRA, EDP Sciences, 2010

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