Oxygen permeability of several ceramic oxides above 1200 degrees C

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Oxygen permeability as a function of temperature was measured for several ceramic oxides over the range 1200 to 1700{degrees}C. Of the oxides testbed, alumina, beryllia, yttria, lanthanum halfnate, and calcium zironcate exhibited the lowest permeabilities in order of decreasing resistance to oxygen transport. None of the permeability constants were less than the 10{sup {minus}10} to 10{sup {minus}12} g O{sub 2}/cm {center dot} s needed for a useful protective coating system above 1500{degrees}C. In some of the mixed oxide compounds, cation segregation was observed to occur with the more rapidly diffusing species segregating to the side of highest oxygen potential. Thus, ... continued below

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Pages: (33 p)

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Courtright, E.L. & Prater, J.T. January 1, 1992.

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Oxygen permeability as a function of temperature was measured for several ceramic oxides over the range 1200 to 1700{degrees}C. Of the oxides testbed, alumina, beryllia, yttria, lanthanum halfnate, and calcium zironcate exhibited the lowest permeabilities in order of decreasing resistance to oxygen transport. None of the permeability constants were less than the 10{sup {minus}10} to 10{sup {minus}12} g O{sub 2}/cm {center dot} s needed for a useful protective coating system above 1500{degrees}C. In some of the mixed oxide compounds, cation segregation was observed to occur with the more rapidly diffusing species segregating to the side of highest oxygen potential. Thus, segregation must be considered when selecting mixed oxides for high temperature applications.

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Pages: (33 p)

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OSTI; NTIS; GPO Dep.

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  • 16. annual conference on composites, materials, and structures, Coca Beach, FL (United States), 13-16 Jan 1992

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  • Other: DE92006733
  • Report No.: PNL-SA-20302
  • Report No.: CONF-920144--3
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 5946725
  • Archival Resource Key: ark:/67531/metadc1102708

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  • January 1, 1992

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  • Feb. 18, 2018, 3:59 p.m.

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  • April 20, 2018, 1:02 p.m.

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Courtright, E.L. & Prater, J.T. Oxygen permeability of several ceramic oxides above 1200 degrees C, article, January 1, 1992; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1102708/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.