Chapter 8. The Effect of Solid Particles Addition in Sol-Gel Processing of Ceramic Matrix Composites

  1. John B. Wachtman Jr.
  1. Hsien-Kuang Liu and
  2. Azar Parvizi-Majidi

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Liu, H.-K. and Parvizi-Majidi, A. (1994) The Effect of Solid Particles Addition in Sol-Gel Processing of Ceramic Matrix Composites, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch8

Author Information

  1. Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, DE, 19716

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • attributed;
  • eliminate errors;
  • fixation;
  • flexural;
  • compression

Summary

The addition of solid particles to the sol during sol-gel processing of ceramic matrix composites increases composite green density and reduces cracking caused by drying stresses. 3-D angle interlock woven carbon fiber preforms were infiltrated with silica sol containing colloidal silica with selected particle sizes. A pressure infiltration apparatus was used to fabricate composites. Higher composite green densities were obtained with smaller particle sizes. The addition of a deflocculant to the sol increased interparticle repulsive forces, thus enhancing particle packing and composite green density. Particle coating to prevent flocculation also increased composite green density.