Principle of the nitriding reaction
Thermochemical treatment theories - Nitriding - Nitrocarburizing- Iron-nitrogen binary systems and iron-nitrogen ternary systems - Compound layer
Article REF: M1224 V1
Principle of the nitriding reaction
Thermochemical treatment theories - Nitriding - Nitrocarburizing- Iron-nitrogen binary systems and iron-nitrogen ternary systems - Compound layer

Authors : Michel GANTOIS, Jacky DULCY

Publication date: June 10, 2010, Review date: March 26, 2024 | Lire en français

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2. Principle of the nitriding reaction

2.1 Pseudo heterogeneous gas/solid equilibrium

The overall mechanism of nitrogen transfer during the nitriding reaction by the NH 3 molecule is quite identical to that implemented during carbon transfer during the carburizing reaction by the CO molecule in a CO–H 2 mixture, and depends on the transfer resistances R1 (gas-phase transport to the surface through the boundary layer) and R2 (chemical reaction at the surface) (Fig. 16

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