A non-isothermal method was proposed for the determination of the diffusivity of gases in metals. The method permitted the determination of the temperature dependence of the gas diffusion coefficient over a wide temperature range, while using a small number of experiments. The technique was applied to the diffusivity of N in steels, and the results agreed favorably with data that had been obtained using other means.

Determination of the Nitrogen Diffusion Coefficient in Steels with Non-Isothermal Experiments. J.S.Georgiev, L.A.Anestiev: Zeitschrift für Metallkunde, 1998, 89[6], 411-6