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Journal of Materials Science

, Volume 26, Issue 13, pp 3544–3552 | Cite as

Microstructure and micromechanics of the interface in carbon fibre reinforced Pyrex glass

  • S. M. Bleay
  • V. D. Scott
Papers

Abstract

Detailed microstructural studies have been carried out on composites consisting of Pyrex glass reinforced with carbon fibres. Analysis of the fibre-matrix interface showed that some reaction had taken place during fabrication of the composite and that a carbide or oxycarbide layer had formed between the glass and the carbon fibre. The measured interlaminar shear strength of the composite indicated that the layer was not a source of weakness and appeared to be well bonded to the matrix. Substantial fibre pull-out had occurred, however, to expose clean fibre surfaces and smooth sockets. These observations led to the conclusion that the interfacial shear process was confined substantially to the outer layers of the carbon fibre. Confirmatory evidence for the low interfacial friction stress was available from micro-indentation tests which showed fibre displacement relative to the matrix at loads of less than ∼10 kPa. Heat treatment of the composite at 500°C in air caused preferential oxidation of the carbon fibre. Where fibres met the specimen surface, oxidation had proceeded down the fibre to produce a smoothly tapering shape. The rate of oxidation was estimated to be 3 μm h−1 parallel to the fibre axis, but much less than this in a direction perpendicular to the fibre, 0.5 μm h−1, due to the relatively slow diffusion rate of oxygen through glass.

Keywords

Shear Strength Carbon Fibre Interfacial Shear Pyrex Glass Friction Stress 
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.

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References

  1. 1.
    R. A. J. Sambell, D. H. Bowen andD. C. Phillips,J. Mater. Sci. 7 (172) 663.Google Scholar
  2. 2.
    R. A. J. Sambell, A. Briggs, D. C. Phillips andD. H. Bowen,ibid. 7 (1972) 676.CrossRefGoogle Scholar
  3. 3.
    D. C. Phillips, R. A. J. Sambell andD. H. Bowen,ibid. 7 (1972) 1454.CrossRefGoogle Scholar
  4. 4.
    D. C. Phillips,ibid. 9 (1974) 1847.CrossRefGoogle Scholar
  5. 5.
    K. M. Prewo andJ. A. Batt,ibid. 23 (1988) 523.CrossRefGoogle Scholar
  6. 6.
    W. K. Tredway, K. M. Prewo andC. G. Pantano,Carbon 27 (1989) 717.CrossRefGoogle Scholar
  7. 7.
    F. A. Habib, R. G. Cooke andB. Harris,Br. Ceram. Trans. J. 89 (1990) 115.Google Scholar
  8. 8.
    B. A. Ford, R. G. Cooke andS. Ne'wsam,Br. Ceram. Proc. 39 (1987) 229.Google Scholar
  9. 9.
    A. Briggs andR. W. Davidge,Mater. Sci. Engng A109 (1989) 363.CrossRefGoogle Scholar
  10. 10.
    K. M. Prewo andJ. J. Brennan,J. Mater. Sci. 17 (1982) 1201.CrossRefGoogle Scholar
  11. 11.
    S. Yajima, K. Okamura, J. Hayashi andM. Omori,J. Amer. Ceram. Soc. 59 (1976) 324.CrossRefGoogle Scholar
  12. 12.
    S. M. Bleay andV. D. Scott,J. Mater. Sci. 26 (1991) 2229.CrossRefGoogle Scholar
  13. 13.
    D. B. Marshall andA. G. Evans,J. Amer. Ceram. Soc. 68 (1986) 225.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • S. M. Bleay
    • 1
  • V. D. Scott
    • 1
  1. 1.School of Materials ScienceUniversity of BathClaverton DownUK

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