Abstract
The nitriding of titanium by nitrogen has been carried out at 1350 °C and 1450 °C, and the nitrogen concentrations at different levels in the α-phase layer determined by direct analysis, using the14N(d,α)12C nuclear reaction. The concentrations at the α/ε interface agree with the published phase diagram, but a significant deviation is observed at the α/β interface. The diffusion coefficients were calculated from the experimentally obtained profiles and were found to agree well with those calculated using a simple model describing the nitriding reaction. The crystallographic parameters of the hcp titanium α-nitrogen solid solutions were determined and showed evidence of a cooperative effect in the deformation of the crystallographic interstices. Vickers microhardness was measured with a 100 g load for nitrogen concentrations above 10 at. pct.
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Bars, J.P., David, D., Etchessahar, E. et al. Titanium α- nitrogen solid solution formed by high temperature nitriding: diffusion of nitrogen, hardness, and crystallographic parameters. Metall Trans A 14, 1537–1543 (1983). https://doi.org/10.1007/BF02654379
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DOI: https://doi.org/10.1007/BF02654379