Chapter 49. The Interfacial Strengths of Coated and Uncoated SiC Monofilaments Embedded in Borosilicate Glass

  1. John B. Wachtman Jr.
  1. A. J. G. Jurewicz,
  2. R. J. Kerans and
  3. J. Wright

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310557.ch49

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

How to Cite

Jurewicz, A. J. G., Kerans, R. J. and Wright, J. (1989) The Interfacial Strengths of Coated and Uncoated SiC Monofilaments Embedded in Borosilicate Glass, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310557.ch49

Author Information

  1. The High Temperature Composites Research Group of the Wright Research and Development Center (WRDC-MLLM) Wright Patterson AFB, OH

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374863

Online ISBN: 9780470310557

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Keywords:

  • chemical vapor infiltration;
  • fiber push-out and pull-out tests;
  • corning glass works;
  • thermal expansion;
  • bare sic fibers

Summary

Two SiC monofilaments, differing only in that one was coated with a carbon-rich material, were embedded in the same composition glass matrix. Single-fiber pull-out and push-out tests were then performed in order to determine the effect interfacial composition had on the apparent average shear strength and other mechanical parameters. Because these systems were identical except for the coating on the fiber, any measured differences in mechanical properties were attributed to effects of the coating. Measured apparent average shear strengths were higher for samples made from the uncoated SiC monofilament than for samples with the carbon-rich surface. Although the coefficient of thermal expansion for the fiber was greater than that of the matrix, in most cases, a significant frictional stress was measured. The coefficient of initial friction was higher for the uncoated SiC monofilaments than for the coated monofilament. SEM photomicrographs showed that the surface of the bare SiC monofilaments wen pitted, and that the fracture surfaces were rough compared to that of the coated SiC monofilaments.