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Characterization of Low Density Carbon Foams by X-ray Computed Tomography (CT) and Ion Microtomography (IMT)

  • W. E. Moddeman (a1), D. P. Kramer (a1), D. W. Firsich (a1), P. D. Trainer (a1), R. N. Yancy (a2), D. L. Weirup (a3), C. M. Logan (a3), A. E. Pontau (a4), A. J. Antolak (a4) and D. H. Morse (a4)...

Abstract

Two NDT techniques were used to characterize low-density, microcellular, carbon foams fabricated from a salt replica process. The two techniques are x-ray computed tomography (CT) and ion microtomography (IMT); data are presented on carbon foams that contain high-density regions. The data show that densities which differ by <10% are easily observable for these low density (<100 mg/cm3) materials. The data reveal that the carbon foams produced by this replica process have small density variations; the density being ∼30% greater at the outer edges than when compared to the interior of the foam. In addition, the density gradient is found to be rather sharp, that is the density drops-off rapidly from the outer edges to a uniform one in the interior of the foam. This edge build-up in carbon density was explained in terms of polymer concentrating on the foam exterior during drying which immediately followed a polymer infusion processing step. Supporting analytical data from other techniques show the foam material to be >99.9 % carbon

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Characterization of Low Density Carbon Foams by X-ray Computed Tomography (CT) and Ion Microtomography (IMT)

  • W. E. Moddeman (a1), D. P. Kramer (a1), D. W. Firsich (a1), P. D. Trainer (a1), R. N. Yancy (a2), D. L. Weirup (a3), C. M. Logan (a3), A. E. Pontau (a4), A. J. Antolak (a4) and D. H. Morse (a4)...

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