Thermal imaging measurement of lateral thermal diffusivity in continuous fiber ceramic composites

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Infrared thermal imaging has become a common technique for nondestructive evaluation and measurement of thermal properties in ceramic specimens. Flash thermal imaging can be used to determine two-dimensional through-thickness thermal diffusivity in a planar specimen. In this study, the authors extended the method to determine lateral, or transverse, thermal diffusivity in the specimen. During the flash thermal imaging test, pulsed heat energy is applied to a specimen's back surface, which is partially shielded, and the change of temperature distribution on the front surface is monitored by an infrared thermal imaging system. The temperature distribution represents the effect of both the ... continued below

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9 p.

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Sun, J. G.; Deemer, C. & Ellingson, W. A. February 18, 2000.

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Description

Infrared thermal imaging has become a common technique for nondestructive evaluation and measurement of thermal properties in ceramic specimens. Flash thermal imaging can be used to determine two-dimensional through-thickness thermal diffusivity in a planar specimen. In this study, the authors extended the method to determine lateral, or transverse, thermal diffusivity in the specimen. During the flash thermal imaging test, pulsed heat energy is applied to a specimen's back surface, which is partially shielded, and the change of temperature distribution on the front surface is monitored by an infrared thermal imaging system. The temperature distribution represents the effect of both the normal heat transfer through the specimen's thickness and the lateral heat transfer through the interface between the shielded and unshielded back-surface regions. Those temperature distributions are then fitted with a theoretical solution of the heat transfer process to determine the lateral thermal diffusivity at the interface. This technique has been applied to measure lateral thermal diffusivity in a steel plate and a continuous fiber ceramic composite specimen.

Physical Description

9 p.

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OSTI as DE00751846

Medium: P; Size: 9 pages

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  • 24th Annual Cocoa Beach Conference, Cocoa Beach, FL (US), 01/23/2000--01/28/2000

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  • Report No.: ANL/ET/CP-99750
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 751846
  • Archival Resource Key: ark:/67531/metadc708975

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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.

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  • February 18, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 8:10 p.m.

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Sun, J. G.; Deemer, C. & Ellingson, W. A. Thermal imaging measurement of lateral thermal diffusivity in continuous fiber ceramic composites, article, February 18, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc708975/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.