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Journal of Materials Science

, Volume 34, Issue 19, pp 4737–4749 | Cite as

Structure-property relations for silicon nitride matrix composites reinforced with pyrolytic carbon pre-coated Hi-Nicalon fibers

  • B. J. Kooi
  • C. Olivier
  • J. B. Veyret
  • J. Th. M. De Hosson
Article

Abstract

Si3N4 matrix composites reinforced with pyrolytic carbon pre-coated Hi-Nicalon (SiC) fibers, were studied using tensile testing and transmission electron microscopy. Three types of samples were evaluated all with a nominal coating thickness of 200 nm. The composites were densified by hot pressing at 1550 °C (type I and II) and at 1600 °C (type III). The fibers were coated with pyrolytic carbon via CVD with identical (sample I) and opposite (samples II and III) directions of the gas flow and of the fiber movement through the reactor. Tensile testing indicated for the three sample types respectively: brittle behaviour with huge pull out of the fibers, pseudo-plastic behaviour and brittle behaviour with little pull out. TEM indicated for the three sample types debonding typically at the fiber/coating interface, at the coating/matrix interface and in the coating, respectively. The relation between processing, structure, particularly of the coating and its interfaces with the matrix and the fibers and mechanical properties is addressed.

Keywords

Silicon Transmission Electron Microscopy Nitride Tensile Testing Matrix Composite 
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

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • B. J. Kooi
    • 1
  • C. Olivier
    • 2
  • J. B. Veyret
    • 2
  • J. Th. M. De Hosson
    • 1
  1. 1.Department of Applied Physics, Materials Science CentreUniversity of GroningenGroningenThe Netherlands
  2. 2.Institute for Advanced MaterialsJoint Research CentrePettenThe Netherlands

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