OXYGEN TRANSPORT CERAMIC MEMBRANES

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Description

In the present quarter, the possibility of using a more complex interfacial engineering approach to the development of reliable and stable oxygen transport perovskite ceramic membranes/metal seals is discussed. Experiments are presented and ceramic/metal interactions are characterized. Crack growth and fracture toughness of the membrane in the reducing conditions are also discussed. Future work regarding this approach is proposed are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in ... continued below

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39 pages

Creation Information

Bandopadhyay, Dr. Sukumar & Nagabhushana, Dr. Nagendra January 1, 2003.

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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. More information about this report can be viewed below.

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Description

In the present quarter, the possibility of using a more complex interfacial engineering approach to the development of reliable and stable oxygen transport perovskite ceramic membranes/metal seals is discussed. Experiments are presented and ceramic/metal interactions are characterized. Crack growth and fracture toughness of the membrane in the reducing conditions are also discussed. Future work regarding this approach is proposed are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in trans and inter-granular fracture as opposed to pure trans-granular fracture observed in homogeneous conditions. Fracture gradients are reasoned to be due to oxygen gradient set up in the membrane, variation in stoichiometry across the thickness and due to varying decomposition of the parent perovskite. The studies are useful in predicting fracture criterion in actual reactor conditions and in understanding the initial evolution of fracture processes.

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39 pages

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OSTI as DE00818110

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  • Other Information: PBD: 1 Jan 2003

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  • Report No.: NONE
  • Grant Number: FC26-99FT40054
  • DOI: 10.2172/818110 | External Link
  • Office of Scientific & Technical Information Report Number: 818110
  • Archival Resource Key: ark:/67531/metadc740751

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Creation Date

  • January 1, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 3, 2017, 1:08 p.m.

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Bandopadhyay, Dr. Sukumar & Nagabhushana, Dr. Nagendra. OXYGEN TRANSPORT CERAMIC MEMBRANES, report, January 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc740751/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.