Chapter 60. Electron Microscopy Characterization of Interfaces in CVD-Coated Nicalon Fiber-Reinforced Silicon Carbide

  1. John B. Wachtman Jr.
  1. K. L. Moore and
  2. R. A. Lowden

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310588.ch60

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

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

How to Cite

Moore, K. L. and Lowden, R. A. (1989) Electron Microscopy Characterization of Interfaces in CVD-Coated Nicalon Fiber-Reinforced Silicon Carbide, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310588.ch60

Author Information

  1. Metals & Ceramics Division Oak Ridge National Laboratory Oak Ridge, TN 37831-6064

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374870

Online ISBN: 9780470310588

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Keywords:

  • separate coatings;
  • nicalon fibers;
  • chemical vapor;
  • bonding characteristics;
  • uncoated fiber

Summary

Chemical vapor deposition was used to apply separate coatings of Si, B, C, and BN onto Nicalon fibers. After deposition of the coating, composites were formed by chemical vapor infiltration of SiC. Fiber coatings are being investigated as a method to modify interfacial bonding characteristics in the composite and thus affect the overall strength. Boron and silicon coatings resulted in brittle fracture similar to that obtained for the uncoated fiber composite whereas the carboncoated fiber composite showed higher strength and exhibited fiber pullout. Transmission, analytical, and scanning electron microscopy techniques were used to characterize the interface and to relate the microstructural results to the mechanical properties of each composite.