Hostname: page-component-745bb68f8f-grxwn Total loading time: 0 Render date: 2025-01-27T03:11:14.021Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  22 February 2011

W. E. Moddeman ,
D. P. Kramer ,
D. W. Firsich ,
P. D. Trainer ,
R. N. Yancy ,
D. L. Weirup ,
C. M. Logan ,
A. E. Pontau ,
A. J. Antolak  and
D. H. Morse
W. E. Moddeman
Affiliation:
EG&G Mound Applied Technologies, Miamisburg, OH 45343
D. P. Kramer
Affiliation:
EG&G Mound Applied Technologies, Miamisburg, OH 45343
D. W. Firsich
Affiliation:
EG&G Mound Applied Technologies, Miamisburg, OH 45343
P. D. Trainer
Affiliation:
EG&G Mound Applied Technologies, Miamisburg, OH 45343
R. N. Yancy
Affiliation:
ARACOR, Wright-Patterson Air Force Base, Dayton, OH 45433
D. L. Weirup
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551
C. M. Logan
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551
A. E. Pontau
Affiliation:
Sandia National Laboratory/Livermore, Livermore, CA 94551
A. J. Antolak
Affiliation:
Sandia National Laboratory/Livermore, Livermore, CA 94551
D. H. Morse
Affiliation:
Sandia National Laboratory/Livermore, Livermore, CA 94551
Get access

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

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 217: Symposium U – Advanced Tomographic Imaging Methods for the Analysis of Materials , 1990 , 205
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Hopper, R. W. and Pekala, R. W., U. S. Patent Nos. 4756898, July 12, 1988 and 4806290, February, 21 1989.Google Scholar
2. Pekala, R. W. and Hopper, R. W., J. Materials Sci., 22, 1840 (1987).Google Scholar
3. Wrobleski, D. A., Abel, K. H., Gray, A. J. and Williams, J. M., “Potential foams and metal foil for cosmic dust capture”, Report No. LA-11271-MS, Los Alamos National Lab., NM, July 1988.Google Scholar
4.. Newton, T. H. and Potts, D. G., ed “Technical Aspects of Computed Tomography,” in Vol 5, “Radiology of the Skull Brain,” 1981. C. V. Mosby Co. St Louis, MO. Google Scholar
5. Pontau, A. E., Antolak, A. J., Morse, D. H., et al, Nucl. Instr. and Meth. B40/41, 646 (1989).CrossRefGoogle Scholar