The kinetics of diffusion of hydrogen in niobium

  title={The kinetics of diffusion of hydrogen in niobium},
  author={T. {\"O}. Oĝurtani},
  journal={Metallurgical and Materials Transactions B},
The kinetics of hydrogen diffusion in niobium were studied in the temperature ranges of 200° to 300°C and 600° to 700°C by gas-metal absorption experiments. The hardness profile was correlated with the concentration of hydrogen on specimens of various grain sizes. It was found that the diffusion kinetics of both temperature ranges could be represented by a single Arrhenius-type rate equation. The activation energy and the preexponential factor were found to be 10.000±320 cal per mole, and 1.8±1… CONTINUE READING