A Study of Copper Oxidation and Some Irradiation Effects. Final Report

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A new volumetric apparatus and a procedure for the study of the kinetics of oxidation of metals in a nuclear reactor are described. Measurements were made on the initial stages of oxidation of 99.999% pure, polycrystalline Cu wires at 100 to 300 c- C. The O gas was held at constant pressures during each isothermal oxidation. The pressures employed ranged from 50 to 200 mm Hg. A significant increase in logarithmic oxidation rate was observed in the presence of 2 x 10/sup 6/ r/hr of gamma irradiation in the temperature range 100 to 250 c- C. The experimental data were ... continued below

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Pages: 45

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Tobin, J. M. February 1, 1963.

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Description

A new volumetric apparatus and a procedure for the study of the kinetics of oxidation of metals in a nuclear reactor are described. Measurements were made on the initial stages of oxidation of 99.999% pure, polycrystalline Cu wires at 100 to 300 c- C. The O gas was held at constant pressures during each isothermal oxidation. The pressures employed ranged from 50 to 200 mm Hg. A significant increase in logarithmic oxidation rate was observed in the presence of 2 x 10/sup 6/ r/hr of gamma irradiation in the temperature range 100 to 250 c- C. The experimental data were interpreted to be in support of the discontinuous oxidation theory of Benard. Sharp transitions were observed in the kinetic rate laws. In general, a logarithmic rate region was observed that was both preceded and followed by regions of parabolic rate behavior. No cubic rate behavior was observed. The effect of temperature on the parabolic rate constants was found to obey the Arrhenius equation. The activation energy was found to be from 0.73 to 0.82 ev, and the logarithmic rate constants were found to be independent of temperature. The effect of pressure was observed to be marked in the early part of the oxidation. Increased pressure of O decreases the transition time and thickness where the change from parabolic to logarithmic rate behavior occurs. (auth)

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Pages: 45

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  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: GA-3349
  • Grant Number: AT(04-3)-407
  • DOI: 10.2172/4677316 | External Link
  • Office of Scientific & Technical Information Report Number: 4677316
  • Archival Resource Key: ark:/67531/metadc1029501

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 1963

Added to The UNT Digital Library

  • Oct. 18, 2017, 7:39 a.m.

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  • Dec. 20, 2017, 1:28 p.m.

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Tobin, J. M. A Study of Copper Oxidation and Some Irradiation Effects. Final Report, report, February 1, 1963; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc1029501/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.