This webpage includes self and impurity diffusion coefficients. It is a reference collection of pre-exponential factors and activation energies for Arrhenius type of equations. The frequency factors and the energies are the ones reported in the literature or assessed in Self-diffusion and impurity diffusion in pure metals by G. Neumann and C. Tujin; i.e no new assessments or accuracy evaluations have been performed in this work. This webpage project is under development and more self-diffusion as well as impurity diffusion data are aimed to be added. NIST Disclaimer
Currently, self-diffusion coefficients are included for the following elements:An element is selected by clicking in the periodic table and the diffusion data is shown in the table below. In the case of impurity diffusion data, the first element selected is the solvent (matrix) element and the second (ctrl+click) is the impurity element (diffusing element). If only one element is selected, all the data for impurity diffusion in that matrix element is shown. The data in the table can be sorted by clicking the header of each column. The different data sets can be compared graphically by selecting the sets of interest using ctrl+click or shift+click. To identify the data sets in the Arrhenius plot, hover over the lines. Experimental data sets are shown as one-colored solid lines whereas calculated values are shown as solid two-colored lines for diffusion in stable structures and as dashed lines for diffusion in not stable structures. In the case of CALPHAD diffusion mobility data, the lines are dotted. The reference sources can be obtained by clicking the lines in the graph or the reference link in the table.