Abstract
A new concept is introduced to minimize the oxidation embrittlement problem exhibited by Nicalon fibre-reinforced glass-ceramic matrix composites. A small amount of glass is added to the matrix and deforms at temperatures of interest to prevent microcrack formation. The graphitic interphase is thus shielded from an oxidative environment. The composites fabricated with the glass-doped matrices show excellent room- and elevated-temperature strengths and withstand high stresses at elevated temperatures in air for greater than 100 h without any deterioration in properties. The modulus of the glass-ceramic phase, the stiffness percentage of dopant glass and the process temperature were found to affect composite properties significantly.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K. M. Prewo and J. J. Brennan, J. Mater. Sci. 15 (1980) 463.
J. J. Brennan and K. M. Prewo, ibid. 17 (1982) 2871.
K. Chyung, M. P. Taylor and R. L. Stewart, presented at 8th Annual Meeting of the American Ceramic Society, Cincinnati, May 1985.
R. L. Stewart, K. Chyung, M. P. Taylor and R. F. Cooper, in “Fracture Mechanics of Ceramics”, Vol. 7, edited by R. C. Bradt, D. P. H. Hasselman, A. G. Evans and F. F. Lange (Plenum, 1986).
K. P. Gadkaree, K. C. Chyung and M. P. Taylor, J. Mater. Sci. 23 (1988) 3711.
R. W. Rice, US Patent 4642271.
K. Chyung and S. B. Dawes, J. Mater. Sci. Eng. A162 (1993) 27.
K. P. Gadkaree, J. Mater. Sci. 26 (1991) 4845.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gadkaree, K.P. Glass-ceramic matrix composites with high oxidation embrittlement resistance. JOURNAL OF MATERIALS SCIENCE 29, 2417–2424 (1994). https://doi.org/10.1007/BF00363435
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00363435