Advertisement

Journal of Materials Science

, Volume 26, Issue 4, pp 970–976 | Cite as

Effect of thermochemical treatments on the strength and microstructure of SiC fibres

  • B. A. Bender
  • J. S. Wallace
  • D. J. Schrodt
Papers

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.

Keywords

Microstructure Optical Microscopy Auger Thermal Cycle Substantial Improvement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    S. Yajima, K. Okamura, J. Hayashi andM. Omori,J. Amer. Ceram. Soc. 59 (1976) 324.CrossRefGoogle Scholar
  2. 2.
    K. M. Prewo,J. Mater. Sci. 21 (1986) 3590.CrossRefGoogle Scholar
  3. 3.
    B. A. Bender, D. S. Shadwell, C. Bulik, L. Incorvati andD. Lewis,Bull. Amer. Ceram. Soc. 65 (1986) 363.Google Scholar
  4. 4.
    T. Yamamura,Polym. Preprints 25 (1984) 8.Google Scholar
  5. 5.
    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.CrossRefGoogle Scholar
  6. 6.
    S. M. Johnson, R. D. Brittain, R. H. Lamoreaux andD. J. Johnson-Rowcliffe,J. Amer. Ceram. Soc. 71 (1988) C-132.Google Scholar
  7. 7.
    K. L. Luthra,ibid. 69 (1986) C-231.CrossRefGoogle Scholar
  8. 8.
    G. Simon andR. A. Bunsell,J. Mater. Sci. 19 (1984) 3658.CrossRefGoogle Scholar
  9. 9.
    Y. Sasaki, Y. Hishina, M. Sato andK. Okamura,ibid. 22 (1987) 443.CrossRefGoogle Scholar
  10. 10.
    C. H. Anderson andR. Warren,Composites 15 (1984) 16.CrossRefGoogle Scholar
  11. 11.
    G. Simon andA. R. Bunsell,J. Mater. Sci. 19 (1984) 3649.CrossRefGoogle Scholar
  12. 12.
    A. R. Bunsell andG. Simon,Compos. Sci. Tech. 27 (1986) 157.CrossRefGoogle Scholar
  13. 13.
    T. J. Clark, R. M. Arons, J. B. Stamatoff andJ. Rabe,Ceram. Engng Sci. Proc. 6 (1985) 576.CrossRefGoogle Scholar
  14. 14.
    T. J. Clark, M. Jaffe, J. Rabe andN. R. Langby,ibid. 7 (1986) 901.CrossRefGoogle Scholar
  15. 15.
    L. C. Sawyer, R. T. Chen, F. Haimback, P. J. Harget, E. R. Frack andM. Jaffe,ibid. 7 (1986) 914.CrossRefGoogle Scholar
  16. 16.
    R. Chaim, A. H. Heuer andR. T. Chen,J. Amer. Ceram. Soc. 71 (1988) 960.CrossRefGoogle Scholar
  17. 17.
    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.Google Scholar
  18. 18.
    T. Yamamura, T. Ishikawa, M. Shibuya, T. Hisayuki andK. Okamura,J. Mater. Sci. 23 (1988) 2589.CrossRefGoogle Scholar
  19. 19.
    “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).Google Scholar
  20. 20.
    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.Google Scholar
  21. 21.
    J. J. Mecholsky, R. W. Rice andS. W. Freiman,J. Amer. Ceram. Soc. 57 (1974) 440.CrossRefGoogle Scholar
  22. 22.
    L. C. Sawyer, J. Jamieson, D. Brikowski, M. I. Haider andR. T. Chen,ibid. 70 (1987) 798.CrossRefGoogle Scholar
  23. 23.
    T. J. Clarke, E. R. Prack, M. I. Haider andL. C. Sawyer,Ceram. Engng Sci. Proc. 8 (1987) 717.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • B. A. Bender
    • 1
  • J. S. Wallace
    • 2
  • D. J. Schrodt
    • 3
  1. 1.Naval Research LaboratoryWashington, D.C.USA
  2. 2.National Institute of Standards and TechnologyGaithersburgUSA
  3. 3.Catalyst Research CorporationBaltimoreUSA

Personalised recommendations