Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-11T02:04:20.624Z Has data issue: false hasContentIssue false
  • English
  • Français

Numerical simulation of the growth of theγ’-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
Get access

Abstract

The aim of this study is the control of the growth of the γ’-ironnitride layer during gas nitriding. We simultaneously simulated both the gaseous and solidphases as well as the development of the γ’-iron nitride layer on theα-iron nitride layer. The theoretical atomic nitrogen flux at constantsuperficial concentration was used as the boundary limit at the sample’s surface. Onlyusing the input data, we obtained, as a function of the time, the atomic nitrogen profilesin 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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

H.C.F. Rozendaal, E.J. Mittemeijer, P.F. Colijn, P.J.S. Vander, Laboratory of metallurgy, Delft University of Technology, Rotterdamseweg, Al Delft, The Nether- lands, 1982, 137, 2628
Cheung, C.T., Simkovich, G., Reactivity of solids, 7 (1989), 115-129 Google Scholar
L. Torchane, P. Bilger, H. Michel, P. Casadesus, M. Gantois, International Conference “Surface engineering”, Bremen, March 9-11, 1993
Grabke, H.J., Ber Bunsenges, 72 (1968), 533-541
R.S. Bordkey, H.C. Hershey, Transport phenomena a unified approach, Mc-Graw Hill, 1988
V.S. Patankar, Numerical heat transfer and fluid flow, Hemisphere publishing flows, 1980
M. Rida, Thèse INPL, Ecole des Mines de Nancy, LSGS, 1994
Heger, D., Bergner, D., Berechnung der stickstoffverteilung in gaznitrierten eisenlegierungen, HTM, 46 (1991), 331-338 Google Scholar
Y. Adda, J. Philibert, La diffusion dans les solides, Tom I, Presses Universitaires de France, 1966
J. Crank, The mathematics of diffusion, Oxford 1975
Pulkinen, R.E.E., Kinetics of nitrogen of α-irons containing chromium, molybdenum, and silicon in ammonia-hydrogen mixtures, Metal science, 16 (1982), 37-40 CrossRefGoogle Scholar
L. Torchane, T. Chaer, M. Rida, Optimisation des conditions de nitruration des aciers avec des mélanges NH3-H2-N2, Revue de Métallurgie, septembre 1991, p. 567
J. Crank, Free and moving boundary problems, Clarendon press, Oxford 1984