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Title: Thermal diffusivity mapping of 4D carbon-carbon composites

Abstract

High resolution, 2-D thermal diffusivity maps of carbon-carbon composites were obtained by a state-of-the-art infrared thermal imaging system. Unlike the traditional single-point IR detector used for thermal diffusivity measurements, the IR camera is capable of capturing images in its 256 x 256 pixel Focal Plane Array detector in a snap-shot mode. The camera takes up to 200 images at a rate of 120 frames/second. The temperature resolution of the Ir camera is 0.015 C and the spatial resolution is 20 {micro}m. Thermal diffusivity was calculated for each pixel. Four-direction carbon-carbon composites were used for the thermal diffusivity mapping study. The fiber bundles along the heat flow direction were found to have 25% higher diffusivity values than the surrounding matrix. The diffusivity map also showed detailed local variations in diffusivity which were impossible to measure using a single-point detector. Accurate diffusivity maps are very important to the design of composite materials.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
446404
Report Number(s):
CONF-970159-2
ON: DE97003485; TRN: AHC29706%%110
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Conference: 21. annual Cocoa Beach conference and exposition, Cocoa Beach, FL (United States), 12-16 Jan 1997; Other Information: PBD: [1997]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; THERMAL DIFFUSIVITY; CARBON; EXPERIMENTAL DATA; CARBON FIBERS; INFRARED THERMOGRAPHY

Citation Formats

Wang, H., and Dinwiddie, R.B.. Thermal diffusivity mapping of 4D carbon-carbon composites. United States: N. p., 1997. Web. doi:10.2172/446404.
Wang, H., & Dinwiddie, R.B.. Thermal diffusivity mapping of 4D carbon-carbon composites. United States. doi:10.2172/446404.
Wang, H., and Dinwiddie, R.B.. Sat . "Thermal diffusivity mapping of 4D carbon-carbon composites". United States. doi:10.2172/446404. https://www.osti.gov/servlets/purl/446404.
@article{osti_446404,
title = {Thermal diffusivity mapping of 4D carbon-carbon composites},
author = {Wang, H. and Dinwiddie, R.B.},
abstractNote = {High resolution, 2-D thermal diffusivity maps of carbon-carbon composites were obtained by a state-of-the-art infrared thermal imaging system. Unlike the traditional single-point IR detector used for thermal diffusivity measurements, the IR camera is capable of capturing images in its 256 x 256 pixel Focal Plane Array detector in a snap-shot mode. The camera takes up to 200 images at a rate of 120 frames/second. The temperature resolution of the Ir camera is 0.015 C and the spatial resolution is 20 {micro}m. Thermal diffusivity was calculated for each pixel. Four-direction carbon-carbon composites were used for the thermal diffusivity mapping study. The fiber bundles along the heat flow direction were found to have 25% higher diffusivity values than the surrounding matrix. The diffusivity map also showed detailed local variations in diffusivity which were impossible to measure using a single-point detector. Accurate diffusivity maps are very important to the design of composite materials.},
doi = {10.2172/446404},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 1997},
month = {Sat Mar 01 00:00:00 EST 1997}
}

Technical Report:

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