Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-27T01:46:22.057Z Has data issue: false hasContentIssue false
  • English
  • Français

Alpha-Si3N4 Precipitation in C/C-SiC Composites from inherent Fiber Impurity Sources

Published online by Cambridge University Press:  15 February 2011

Roland Pleger  and
Wolfgang Braue
Roland Pleger
Affiliation:
German Aerospace Research Establishment (DLR), Materials Research Institute, Linder Hoehe, D-51147 Cologne, Germany
Wolfgang Braue
Affiliation:
German Aerospace Research Establishment (DLR), Materials Research Institute, Linder Hoehe, D-51147 Cologne, Germany
Get access

Abstract

The formation of crystalline α-Si3N4 filaments grown inside the pore channels of HT-carbon fibers from a 2D C/C-SiC composite is investigated by transmission electron microscopy. Precipitation of α-Si3N4 is promoted by a low carbonization heat treatment of the C/C material prior to liquid silicon infiltration and results from the interaction of a highly reactive nitrogen-rich vapor phase released from the fiber and silicon vapor diffusing ahead of the SiC reaction front into the porous microtexture of the fiber.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 89
Copyright
Copyright © Materials Research Society 1995

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

[1] Hdraud, L. and Spriet, P., in Whisker and Fiber Toughened Ceramics, edited by Bradley, R. A., Clark, D. E., Larsen, D. C. and Stiegler, J. O., ASM International, Metals Park, OH, 217 (1988)Google Scholar
[2] Fitzer, E. and Gadow, R., Am. Ceram. Soc. Bull. 65, 326 (1986)Google Scholar
[3] Moulson, A. J., J. Mater. Sci. 14, 1017 (1979)Google Scholar
[4] Zhou, Y. C., Chang, X., Zhou, J. and Xia, F., J. Mater. Sci. 26, 3914 (1991)Google Scholar
[5] Lim, C. B. and Iseki, T., Ad. Ceram. Mater. 3, 590 (1988)Google Scholar
[6] Steeds, J., in Introduction to Analytical Electron Microscopy, edited by Hren, J. J., Goldstein, J. I. and Joy, D. C., Plenum Press, 387 (1979)Google Scholar
[7] Guigon, M., Oberlin, A. and Desarmot, G., Fibre Sci. Technol. 20, 55 (1984)Google Scholar
[8] Yoshida, A., Kaburagi, Y. and Hishiyama, Y., Carbon 29, 1107 (1991)Google Scholar
[9] Pleger, R. and Braue, W., Proc. 5th International Carbon Conference, June 22-26, 1992, Essen/Germany, Deutsche Keramische Gesellschaft, 653 (1992)Google Scholar
[10] Fitzer, E. and Heine, M., in Fibre Reinforcements For Composite Materials, edited by Bunsell, A. R., Elsevier, 73 (1988)Google Scholar
[11] Greskovich, C. and Prochaska, S., J. Am. Ceram. Soc. 64, C96–97 (1981)Google Scholar
[12] Luthra, K. L., J. Am. Ceram. Soc. 69, C231–C233 (1986)Google Scholar
[13] Misra, A. K., J. Mater. Sci. 26, 6591 (1991)Google Scholar