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Journal of Materials Science

, Volume 44, Issue 12, pp 3255–3264 | Cite as

New route to process uni-directional carbon fiber reinforced (SiC + ZrB2) matrix mini-composites

  • N. PadmavathiEmail author
  • K. K. Ray
  • J. Subrahmanyam
  • P. Ghosal
  • Sweety Kumari
Article

Abstract

Unidirectional carbon fiber-reinforced (SiC + ZrB2) matrix mini-composites were prepared by soft solution route. In this process, the matrix materials were prepared using water-soluble precursors of colloidal silica, sucrose, zirconium oxychloride, and boric acid as sources of silica, carbon, zirconia, and boron oxide respectively. The room temperature mechanical properties were investigated and the fracture features of the composites were examined. Tensile strength of 269 ± 36 MPa and fracture energy of 0.38 ± 0.05 MJ/m3 for the mini-composite, carbothermally reduced at 1,600 °C were attributed to the fiber pull out. In spite of a composite failure mode, the composite carbothermally reduced at 1,700 °C exhibited lower mechanical properties. It showed that carbon fibers reacted with ZrO2 to form ZrC phase at 1,700 °C, formed chemical bonding, and led to a strong interface between fibers and matrix, which resulted in the degradation of mechanical properties of the mini-composites. The XRD and SEM investigations of the powders and the mini-composites revealed phase formation whereas cross-sectional microstructure indicated the uniform distribution of fibers within the matrix.

Keywords

Carbon Fiber B2O3 Carbothermal Reduction Matrix Interface Boron Oxide 
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.

Notes

Acknowledgements

The authors thankfully acknowledge the financial support received from the Defence Research and Development Organisation, Govt of India in order to carry out this research study. Thanks are also due to SFAG for XRD, and Mr. Rajdeep Sarkar for his valuable help in SEM studies. The authors are grateful to Director, Defence Metallurgical Research Laboratory, Hyderabad for giving permission to publish this article and for his continuous support.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • N. Padmavathi
    • 1
    • 2
    Email author
  • K. K. Ray
    • 2
  • J. Subrahmanyam
    • 1
  • P. Ghosal
    • 1
  • Sweety Kumari
    • 1
  1. 1.Ceramics Composites GroupDefence Metallurgical Research LaboratoryHyderabadIndia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyKharagpurIndia

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