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- W1496996801 abstract "The diffusion coefficient of oxygen has been measured in niobium, vanadium and several dilute substitutional niobium alloys. Measurements were made over the range of 600–1150°C (873–1423 K) using a solid electrolytic cell technique. Oxygen diffusivity in the alloys was found to be less than in pure niobium. This is interpreted as being due to trapping of oxygen atoms by the substitutional solute atoms. The estimated substitutional-oxygen binding or ‘trap’ energies (in eV) for the solutes investigated are: Ta, 0.3 ± 0.1; V, 0.55 ± 0.05; Ti, 0.7 ±0.1; Zr, 0.7 ± 0.05. Nous avons mesuré le coefficient de diffusion de l'oxygène dans le niobium, le vanadium et quelques alliages substitutionnels dilués de niobium. Nous avons effectué des mesures entre 600 et 1150°C (873–1423 K), par la technique de la cellule à electrolyte solide. Nous avons trouvé que la diffusivité de l'oxygène dans les alliages était inférieure à la diffusivité de l'oxygène dans le niobium pur. Nous interprétons cette observation par un piègeage des atomes d'oxygène par les atomes du soluté en substitution. L'estimation des énergies (en eV) de liaison (ou de “piègeage”) entre un atome substitutionnel et un atome d'oxygène donne les valeurs: Ta, 0,3 ± 0,1; V, 0,55 ± 0,05; Ti, 0,7 ± 0,1; Zr, 0,7 ± 0,05. Der Diffusionskoeffizient von Sauerstoff wurde in Niob, Vanadium und verschiedenen verdünnten Substitutionellen Nioblegierungen gemessen. Diese Messungen wurden mittels einer Technik mit fester elektrolytischer Zelle über den Temperaturbereich 600–1150°C (873–1423 K) durchgerührt. In den Legierungen war die Sauerstoffdiffusion geringer als in reinem Niob. Dieser Befund wird dem Einfangen von Sauerstoffatomen an substitutionell gelösten Atomen zugeschrieben. Die daraus abgeschätzten Bindungsenergien zwischen Sauerstoff und gelöstem Atom sind (in eV): Ta, 0,3 ± 0,1; V, 0,55 ± 0,05; Ti, 0,7 ± 0,1; Zr, 0,7 ± 0,05." @default.
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- W1496996801 date "1979-07-01" @default.
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- W1496996801 title "Diffusion and trapping of oxygen in refractory metal alloys" @default.
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- W1496996801 doi "https://doi.org/10.1016/0001-6160(79)90133-0" @default.
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