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

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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

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 NH3 molecule is quite identical to that implemented during carbon transfer during the carburizing reaction by the CO molecule in a CO–H2 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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