38. Preparation and Properties of Dense SiC/SiC Composites

  1. Edgar Lara-Curzio
  1. Michiyuki Suzuki1,
  2. Mitsuhiko Sato1,
  3. Norifumi Miyamoto1 and
  4. Akira Kohyama2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291221.ch38

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

How to Cite

Suzuki, M., Sato, M., Miyamoto, N. and Kohyama, A. (2005) Preparation and Properties of Dense SiC/SiC Composites, in Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2 (ed E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291221.ch38

Author Information

  1. 1

    Ube Industries, Ltd. 1978-5 Kogushi Ube, Yamaguchi, 755-8633, Japan

  2. 2

    Institute of Advanced Energy, Kyoto University Gokasho Uji, Kyoto 611-0011, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982329

Online ISBN: 9780470291221

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Keywords:

  • ceramic matrix composites;
  • transient eutectoid;
  • chemical vapor infiltration;
  • melt infiltration;
  • carbon powder

Summary

SiC/SiC composites fabricated by a new process, named Nano-powder Infiltration and Transient Eutectoid (NITE) process has been developed and exhibited attractive thermomechanical properties and gas tightness. For the NITE-SiC/SiC composites, Tyranno Fiber SA and nano-sized SiC powder with certain amounts of sintering aids were employed as the reinforcement and the starting material of matrix, respectively. The NITE-SiC/SiC composites were densified by hot pressing with 20 MPa at 1800°C. In this study, effects of variation of the nano-sized SiC powders on mechanical properties of the NITE-SiC/SiC composites were evaluated. It was found that high specific surface area and carbon rich atomic ratio of the nanosized SiC powder were necessary for the NITE-SiC/SiC composites with high strength and non-catastorophic fracture behavior. Another objective of the study was to develop the near-net shape process and large-scale production process called pseudo-HIP process, which was a new type HIP using a carbon powder as the pressure transmitter and carbon mold with near-net shape cavity. Small and large diameter cylindrical shape (ϕ12/ϕ 10×50 mm, ϕ200/ϕ 194×80 mm) NITE-SiC/SiC composites can be fabricated by the pseudo-HIP process. Hence, the Pseudo-HIP process was found to be a useful process for near-net shape and large-scale NITE-SiC/SiC products.