Equilibrium and non-equilibrium models of γ'-Fe4N growth during nitriding are considered in an attempt to explain the differences observed in the growth of this phase during glow discharge plasma nitriding and gas nitriding. Calculated results taking account of cathode sputtering agree well with experimentally observed ones. Solutions for the non-equilibrium model approach those of the equilibrium model when mobility of the γ'/α interface approaches infinity.
Get full access to this article
View all access options for this article.
References
1.
BUTENKOO. J. and LACHTINJu. M.: Metalloved. Term. Obrab. Met., 1969, (6), 21–24.
MARCINIAKA. and MICHALOWSKIA.: ‘Models of heat and mass transfer during gas and glow discharge nitriding’, MR-I-21 Report, Institute of Materials Science and Engineering, Warsaw, 1983 (unpublished).
4.
BINGZHONGXU and YINGZHIZh.: Heat Treat. Met., 1983, (10), 29–41.
5.
LAMPET. and RIEK.-T.: Z. Metallkd., 1981, 72, 269–274.
6.
MARCINIAKA.: ‘Models of ᵧ-Fe4N growth during gas and glow discharge nitriding’, MR-I-21 Report, Part II, Institute of Materials Science and Engineering, Warsaw, 1984, 24–79 (unpublished).
7.
SCHWERDTFEGERK., GRIEVESONP., and TURKDOGANE. T.: Trans. AIME, 1969, 245, 2461–2466.
