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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.
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Principle of the nitriding reaction
Solid-state nitrogen transfer
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