PREPARATION AND PROPERTIES OF UO$sub 2$ CERMET FUELS

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Sintering, hot-press forging, and gas-pressure bonding were evaluated as techniques for preparing cermet fuel materials containing at least 60 vol.% UO/ sub 2/ and having a minimum density of 90% of theoretical. Minus 325-mesh chromium, molybdenum, niobium, and Type 302B stainless steel were employed as matrix materials. Hydrothermal and spherical UO/sub 2/ powders were evaluated. Cermets containing 80 vol.% UO/sub 2/ and exhibiting densities in excess of 90% of theoretical were successfully prepared by both hot-press forging and by gas- pressure bonding mixed oxide and metal pcwders. Gas-pressure bonding produced specimens with a more uniform structure and was demonstrated to ... continued below

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Pages: 64

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Paprocki, S.J.; Keller, D.L.; Cunningham, G.W. & Kizer, D.E. December 19, 1960.

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Sintering, hot-press forging, and gas-pressure bonding were evaluated as techniques for preparing cermet fuel materials containing at least 60 vol.% UO/ sub 2/ and having a minimum density of 90% of theoretical. Minus 325-mesh chromium, molybdenum, niobium, and Type 302B stainless steel were employed as matrix materials. Hydrothermal and spherical UO/sub 2/ powders were evaluated. Cermets containing 80 vol.% UO/sub 2/ and exhibiting densities in excess of 90% of theoretical were successfully prepared by both hot-press forging and by gas- pressure bonding mixed oxide and metal pcwders. Gas-pressure bonding produced specimens with a more uniform structure and was demonstrated to be capable of simultaneously densifying and cladding green-pressed cermet fuels. Spherical UO/ sub 2/ powders produced the more homogeneous microstructures. Excellent microstructures were also obtained by the use of UO/sub 2/ pcwder coated wit;i niobium by vapor-deposition techniques. So far as direct comparison is possible the cermets were superior in strength to UO/sub 2/. Strength, which was measured by bend and compression tests, was density dependent. Thermal-conductivity values for the cermets were far higher than values for UO/sub 2/. Electrical- resistivity data were also obtained. These data were used to develop a mathematical correlation of electrical and thermal conductivity but a complete analysis could not be made on the basis of present theories due to the limited number of measurements made. (auth)

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Pages: 64

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • Report No.: BMI-1487
  • Grant Number: W-7405-ENG-92
  • DOI: 10.2172/4102222 | External Link
  • Office of Scientific & Technical Information Report Number: 4102222
  • Archival Resource Key: ark:/67531/metadc870512

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Office of Scientific & Technical Information Technical Reports

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  • December 19, 1960

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Dec. 6, 2016, 4:25 p.m.

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Paprocki, S.J.; Keller, D.L.; Cunningham, G.W. & Kizer, D.E. PREPARATION AND PROPERTIES OF UO$sub 2$ CERMET FUELS, report, December 19, 1960; Columbus, Ohio. (digital.library.unt.edu/ark:/67531/metadc870512/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.