Solubility and diffusion of hydrogen in vanadium-oxygen alloys
Technical Report
·
OSTI ID:5836896
Pressure-composition isotherms at 297 and 373 K were obtained by an isopiestic solubility technique. A small increase in the isopiestic solubility of hydrogen was caused by the addition of oxygen to vanadium, but Sieverts' law was obeyed in each alloy in the hydrogen concentration ranges studied. The macroscopic hydrogen diffusion coefficient as a function of hydrogen concentration was measured at 227, 297 and 373 K by a Boltzmann-Matano method. This method also allowed a determination of the terminal hydrogen solid solubility. A decrease in the hydrogen diffusion coefficient was observed with increasing oxygn concentrations. The observed solubility and diffusion results do not change with hydrogen concentration to show a trap saturation effect as predicted in local deep trap models. The terminal hydrogen solid solubility increased slightly with oxygen concentration.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5836896
- Report Number(s):
- IS-T-1058; ON: DE83016142
- Country of Publication:
- United States
- Language:
- English
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