Oxidation, Volatilization, and Redistribution of Molybdenum from TZM Alloy in Air

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The excellent high temperature strength and thermal conductivity of molybdenum-base alloys provide attractive features for components in advanced magnetic and inertial fusion devices. Refractory metal alloys react readily with oxygen and other gases. Oxidized molybdenum in turn is susceptible to losses from volatile molybdenum trioxide species, (MoO3)m, in air and the hydroxide, MoO2(OH)2, formed from water vapor. Transport of radioactivity by the volatilization, migration, and re-deposition of these volatile species during a potential accident involving a loss of vacuum or inert environment represents a safety issue. In this report we present experimental results on the oxidation, volatilization and re-deposition of ... continued below

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Smolik, Galen Richard; Petti, David Andrew; Mccarthy, Kathryn Ann & Schuetz, Stanley Thomas January 1, 2000.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this report can be viewed below.

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The excellent high temperature strength and thermal conductivity of molybdenum-base alloys provide attractive features for components in advanced magnetic and inertial fusion devices. Refractory metal alloys react readily with oxygen and other gases. Oxidized molybdenum in turn is susceptible to losses from volatile molybdenum trioxide species, (MoO3)m, in air and the hydroxide, MoO2(OH)2, formed from water vapor. Transport of radioactivity by the volatilization, migration, and re-deposition of these volatile species during a potential accident involving a loss of vacuum or inert environment represents a safety issue. In this report we present experimental results on the oxidation, volatilization and re-deposition of molybdenum from TZM in flowing air between 400 and 800°C. These results are compared with calculations obtained from a vaporization mass transfer model using chemical thermodynamic data for vapor pressures of MoO3(g) over pure solid MoO3 and an expression for the vapor pressures of MoO2(OH)2 from the literature. Calculations correlate well with experimental data.

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  • Report No.: INEEL/EXT-99-01353
  • Grant Number: DE-AC07-99ID-13727
  • DOI: 10.2172/911479 | External Link
  • Office of Scientific & Technical Information Report Number: 911479
  • Archival Resource Key: ark:/67531/metadc888418

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2000

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 30, 2016, 3:07 p.m.

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Smolik, Galen Richard; Petti, David Andrew; Mccarthy, Kathryn Ann & Schuetz, Stanley Thomas. Oxidation, Volatilization, and Redistribution of Molybdenum from TZM Alloy in Air, report, January 1, 2000; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc888418/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.