Skip to main content Accessibility help

X-Ray Tomographic Microscopy of Nicalon Preforms and Chemical Vapor Infiltrated Nicalon/Silicon Carbide Composites

  • M. D. Butts (a1), S. R. Stock (a1), J. H. Kinney (a2), T. L. Starr (a1), M. C. Nichols (a3), C. A. Lundgren (a4), T. M. Breunig (a1) and A. Guvenilir (a1)...


Following the evolving microstructure of composites through all stages of chemical vapor infiltration (CVI) is a key to improved understanding and control of the process. X-ray Tomographic Microscopy (XTM), i.e., very high resolution computed tomography, allows the microstructure of macroscopic volumes of a composite to be imaged nondestructively with resolution approaching one micrometer. Results obtained with XTM on dense SiC/SiC composites and on woven SiC fiber preforms illustrate how details of the densification process can be followed using this technique during interruptions in processing. Ways in which the three-dimensional microstructural information may be used to improve modeling are also indicated.



Hide All
1. Besmann, T.M., Sheldon, B.W., Lowden, R.A. and Stinton, D.P., Science, 253, 1104 (1991).
2. Bonse, U., Johnson, Q.C., Nichols, M.C., Nusshardt, R., Krasnicki, S. and Kinney, J.H., Nucl. Instrum. Methods, A246, 644 (1986).
3. Kinney, J.H., Johnson, Q.C., Bonse, U., Nichols, M.C., Saroyan, R.A., Nusshardt, R., Pahl, R. and Brase, J.M., Mat. Res. Soc. Bull., XIII, 13 (1988)
4. Kak, A.C. and Slaney, M., Principles of Computerized Tomographic Imaging, (IEEE Press, New York, 1987).
5. Huesman, R.H., Gullberg, G.T., Greenberg, W.L. and Budinger, T.F., Users Manual: Donner Algorithms for Reconstruction Tomography, (PUB-214, Lawrence Berkeley Laboratory, University of California, 1977).
6. Chawla, K.K., Composite Materials Science and Engineering, (Springer-Verlag, New York, 1987) p. 54.
7. Data sheets, Dow Corning Corporation, Midland, Michigan.
8. International Tables for X-ray Crystallography (Kynoch Press, Birmingham, England, 1972), Vol. 4, p. 61.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed