Thermal diffusivity imaging of continuous fiber ceramic composite materials and components

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Continuous-fiber ceramic matrix composites (CFCCs) are currently being developed for various high-temperature applications, including use in advanced turbine engines. In such composites, the condition of the interfaces between the fibers and matrix or between laminae in a two-dimensional weave lay-up are critical to the mechanical and thermal behavior of the component. A nondestructive evaluation method that could be used to assess the interface condition and/or detect other `defects` has been developed at Argonne National Laboratory (ANL) and uses infrared thermal imaging to provide `single-shot` full- field quantitative measurement of the distribution of thermal diffusivity in large components. By applying digital ... continued below

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12 p.

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Ahuja, S.; Ellingson, W.A.; Steckenrider, J.S. & King, S. December 31, 1995.

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Description

Continuous-fiber ceramic matrix composites (CFCCs) are currently being developed for various high-temperature applications, including use in advanced turbine engines. In such composites, the condition of the interfaces between the fibers and matrix or between laminae in a two-dimensional weave lay-up are critical to the mechanical and thermal behavior of the component. A nondestructive evaluation method that could be used to assess the interface condition and/or detect other `defects` has been developed at Argonne National Laboratory (ANL) and uses infrared thermal imaging to provide `single-shot` full- field quantitative measurement of the distribution of thermal diffusivity in large components. By applying digital filtering, interpolation, and least-squares-estimation techniques for noise reduction, shorter acquisition and analysis times have been achieved with submillimeter spatial resolution for materials with a wide range of `thermal thicknesses`. The system at ANL has been used to examine the effects of thermal shock, oxidation treatment, density variations, and variations in fiber coating in a full array of test specimens. In addition, actual subscale CFCC components of nonplanar geometries have been inspected for manufacturing-induced variations in thermal properties.

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12 p.

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OSTI as DE96014401

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  • 23. international thermal conductivity conference, Nashville, TN (United States), 29 Oct - 1 Nov 1995

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  • Other: DE96014401
  • Report No.: ANL/ET/CP--90247
  • Report No.: CONF-9510111--5
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 406253
  • Archival Resource Key: ark:/67531/metadc678631

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  • December 31, 1995

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 16, 2015, 5:22 p.m.

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Ahuja, S.; Ellingson, W.A.; Steckenrider, J.S. & King, S. Thermal diffusivity imaging of continuous fiber ceramic composite materials and components, article, December 31, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc678631/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.