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Journal of Materials Science

, Volume 26, Issue 7, pp 1808–1814 | Cite as

Tensile creep behaviour of a fibre-reinforced SiC-Si3N4 composite

  • J. W. Holmes
Papers

Abstract

The tensile creep behaviour of a SiC-fibre-Si3N4-matrix composite was investigated in air at 1350 ‡C. The unidirectional composite, containing 30 vol % SCS-6 SiC fibres, was prepared by hot pressing at 1700 ‡C. Creep testing was conducted at stress levels of 70, 110, 150 and 190 MPa. An apparent steady-state creep rate was observed at stress levels between 70 and 150 MPa; at 190 MPa, only tertiary creep was observed. For an applied stress of 70 MPa, the steady-state creep rate was approximately 2.5×10−10 s−1 with failure times in excess of 790 h. At 150 MPa, the steady-state creep rate increased to an average of 5.6×10−8 s−1 with failure times under 40 h. The creep rate of the composite is compared with published data for the steady-state creep rate of monolithic Si3N4.

Keywords

Polymer Stress Level Applied Stress Creep Rate Creep Testing 
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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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • J. W. Holmes
    • 1
  1. 1.Ceraramic Composites Research Laboratory, Department of Mechanical Engineering and Applied MechanicsUniversity of MichiganAnn ArborUSA

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