Abstract
The room-temperature strength of commercially available polymer-derived SiC fibres degrades during the typical high-temperature thermal cycle used in ceramic matrix composite fabrication. Substantial improvements in retained room-temperature strength for two different commercially available fibres were observed after annealing in carbon powder at temperatures up to 1600 °C. Further improvements in strength were observed for both fibres when heat treated in CO atmospheres. X-ray diffraction, TEM, SEM, auger electron spectroscopy, and optical microscopy were used to characterize the microstructure and chemistry of these heattreated fibres in order to understand better the degradation mechanisms of the fibres as well as their improved strength retention.
Similar content being viewed by others
References
S. Yajima, K. Okamura, J. Hayashi andM. Omori,J. Amer. Ceram. Soc. 59 (1976) 324.
K. M. Prewo,J. Mater. Sci. 21 (1986) 3590.
B. A. Bender, D. S. Shadwell, C. Bulik, L. Incorvati andD. Lewis,Bull. Amer. Ceram. Soc. 65 (1986) 363.
T. Yamamura,Polym. Preprints 25 (1984) 8.
T. Mah, N. L. Hecht, D. E. McCullum, J. R. Hoenigman, H. M. Kim, A. P. Katz andH. A. Lipsitt,J. Mater. Sci. 19 (1984) 1191.
S. M. Johnson, R. D. Brittain, R. H. Lamoreaux andD. J. Johnson-Rowcliffe,J. Amer. Ceram. Soc. 71 (1988) C-132.
K. L. Luthra,ibid. 69 (1986) C-231.
G. Simon andR. A. Bunsell,J. Mater. Sci. 19 (1984) 3658.
Y. Sasaki, Y. Hishina, M. Sato andK. Okamura,ibid. 22 (1987) 443.
C. H. Anderson andR. Warren,Composites 15 (1984) 16.
G. Simon andA. R. Bunsell,J. Mater. Sci. 19 (1984) 3649.
A. R. Bunsell andG. Simon,Compos. Sci. Tech. 27 (1986) 157.
T. J. Clark, R. M. Arons, J. B. Stamatoff andJ. Rabe,Ceram. Engng Sci. Proc. 6 (1985) 576.
T. J. Clark, M. Jaffe, J. Rabe andN. R. Langby,ibid. 7 (1986) 901.
L. C. Sawyer, R. T. Chen, F. Haimback, P. J. Harget, E. R. Frack andM. Jaffe,ibid. 7 (1986) 914.
R. Chaim, A. H. Heuer andR. T. Chen,J. Amer. Ceram. Soc. 71 (1988) 960.
W. Atwell, P. Fowley, W. E. Hauth, R. E. Jones, N. R. Langley andR. F. Salinger, “Advanced Ceramics Based on Polymer Processing, Vol. 1: Fiber Technology”, DARPA Final Report for the period February 1985 to February 1986, Contract F33615-83-C-5006, November 1986.
T. Yamamura, T. Ishikawa, M. Shibuya, T. Hisayuki andK. Okamura,J. Mater. Sci. 23 (1988) 2589.
“Standard Test Method for Tensile Strength and Young's Modulus for High Modulus Single Fibre Materials”, ASTM D3379-75 (American Society for Testing and Materials, Philadelphia, 1975).
J. S. Wallace, B. A. Bender andD. J. Schrodt, in “Proceedings of the Joint NASA/DoD Conference on Metal Matrix, Carbon, and Ceramic Matrix Composites”, Cocoa Beach, Florida, January 1987, edited by J. Buckley (NASA Conference Publication 2482, Washington, D.C., 1987) p. 201.
J. J. Mecholsky, R. W. Rice andS. W. Freiman,J. Amer. Ceram. Soc. 57 (1974) 440.
L. C. Sawyer, J. Jamieson, D. Brikowski, M. I. Haider andR. T. Chen,ibid. 70 (1987) 798.
T. J. Clarke, E. R. Prack, M. I. Haider andL. C. Sawyer,Ceram. Engng Sci. Proc. 8 (1987) 717.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bender, B.A., Wallace, J.S. & Schrodt, D.J. Effect of thermochemical treatments on the strength and microstructure of SiC fibres. J Mater Sci 26, 970–976 (1991). https://doi.org/10.1007/BF00576774
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00576774