New methodology for the determination of hydrogen permeation parameters in layered materials Export

@article{citeulike:1538136, abstract = {A new methodology for interpreting hydrogen permeation test data has been proposed with the objective of determining hydrogen permeability, solubility and diffusivity in materials containing surface-coating layers. The mathematical development of equations has been undertaken for steady-state hydrogen permeation conditions allowing the determination of all parameters of interest for the composite material and the coating layer itself. For a single-layered material, a set of three statistically significant permeation tests is enough to determine all variables for the substrate, the composite material and the coating layer. This methodology has been applied to published results on the hydrogen permeation in nitrogen ion-implanted extra-low carbon steel, showing that the hydrogen diffusion coefficient in such a coating layer is several orders of magnitude lower than that in the substrate. The hydrogen solubility in the layer is, by contrast, increased. The magnitudes of these effects depend on the nitrogen concentration in the surface layer.}, author = {Miranda, P. E. V. and Fassini, F. D.}, citeulike-article-id = {1538136}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/BF00570055}, day = {1}, doi = {10.1007/BF00570055}, journal = {Journal of Materials Science}, keywords = {diffusion, electrochemical, fe, hydrogen, layer, multi, permeation, steel}, month = {January}, number = {19}, pages = {5148--5154}, posted-at = {2007-08-06 14:37:32}, priority = {2}, title = {New methodology for the determination of hydrogen permeation parameters in layered materials}, url = {http://dx.doi.org/10.1007/BF00570055}, volume = {28}, year = {1993} }

TY - JOUR ID - citeulike:1538136 L3 - citeulike-article-id:1538136 N2 - A new methodology for interpreting hydrogen permeation test data has been proposed with the objective of determining hydrogen permeability, solubility and diffusivity in materials containing surface-coating layers. The mathematical development of equations has been undertaken for steady-state hydrogen permeation conditions allowing the determination of all parameters of interest for the composite material and the coating layer itself. For a single-layered material, a set of three statistically significant permeation tests is enough to determine all variables for the substrate, the composite material and the coating layer. This methodology has been applied to published results on the hydrogen permeation in nitrogen ion-implanted extra-low carbon steel, showing that the hydrogen diffusion coefficient in such a coating layer is several orders of magnitude lower than that in the substrate. The hydrogen solubility in the layer is, by contrast, increased. The magnitudes of these effects depend on the nitrogen concentration in the surface layer. IS - 19 JF - Journal of Materials Science EP - 5154 TI - New methodology for the determination of hydrogen permeation parameters in layered materials VL - 28 SP - 5148 KW - diffusion KW - electrochemical KW - fe KW - hydrogen KW - layer KW - multi KW - permeation KW - steel AU - Miranda, PEV AU - Fassini, FD PY - 1993/01/01/ UR - http://dx.doi.org/10.1007/BF00570055 ER -