Accession Number : AD0715006

Title :   Determination of Oxygen Diffusion Coefficients in Tungsten Oxide.

Descriptive Note : Technical rept.,

Corporate Author : CINCINNATI UNIV OHIO DEPT OF MATERIALS SCIENCE AND METALLURGICAL ENGINEERING

Personal Author(s) : Sikka,V. K. ; Rosa,C. J.

Report Date : AUG 1970

Pagination or Media Count : 54

Abstract : 'Interruption Kinetic Technique' experiments carried out on tungsten oxide films formed on tungsten yield the expression for the diffusion coefficient of oxygen anion vacancies for the temperature range 568 - 908C. Calculations are made for the concentration of oxygen vacancies, for their free energy of formation and for ionic conductivity in tungsten oxide. Deviations from stoichiometry in the oxide are plotted against temperature on the available W-O phase diagram. (Author)

Descriptors :   (*TUNGSTEN, *OXIDATION), (*TUNGSTEN COMPOUNDS, DIFFUSION), (*OXYGEN, *DIFFUSION), KINETIC THEORY, CRYSTAL DEFECTS, PHASE DIAGRAMS

Subject Categories : Physical Chemistry
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE