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Polymer Infiltration and Pyrolysis Fabrication of SiC/SiC Composite for Nuclear Applications
Proceedings of the Composites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation (2014, Orlando, FL)
  • James R. Nicholas
  • Robert R. Meinders
  • K. Chandrashekhara, Missouri University of Science and Technology
  • Greg Hilmas, Missouri University of Science and Technology
  • Carlos Henry Castano Giraldo, Missouri University of Science and Technology
Abstract

Polymer Infiltration and Pyrolysis (PIP) is one of the most attractive fabrication processes for silicon carbide (SiC) composites due to shape flexibility, mass production and relatively low cost; however, the quality of material obtained by this method has been considered insufficient for use in nuclear applications due to the microstructure of the material obtained. For this study SiC fiber-resuborced SiC (SiCf/SiC) composites are prepared by a modified PIP process named Dry Press Infiltration and Pyrolysis (DPIP). This process combines a well-established ceramic greenbody forming technique, dry pressing, with the PIP process. A woven SiC fiber mat is subiltrated with a slurry of preceramic polymer and ß-SiC micro particles, dry pressed and cured to a greenbody state. The material is then subjected to a repeated cycle of pyrolization and resubiltration with a final heat treatment to achieve a dense crystalline matrix material. The microstructure is analyzed and the thermo-mechanical properties are investigated from room to high temperature. The matrix subiltration and densification indicates a capacity to produce dense, stoichiometric crystalline SiC. The material shows good damage tolerance due to crack deviation, fiber pull-out and there is no degradation up to 1500 ⁰C.

Meeting Name
Composites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation (2014: Oct. 13-16, Orlando, FL)
Department(s)
Mechanical and Aerospace Engineering
Second Department
Materials Science and Engineering
Third Department
Nuclear Engineering and Radiation Science
Keywords and Phrases
  • Crystalline materials,
  • Mechanical properties,
  • Microstructure,
  • Polymers,
  • Pressing (forming),
  • Strength of materials,
  • Crystalline matrices,
  • Fabrication process,
  • Final heat treatments,
  • Nuclear application,
  • Polymer subiltration and pyrolysis,
  • Quality of materials,
  • Silicon carbides (SiC),
  • Thermomechanical properties
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2014 The Composites and Advanced Materials Expo (CAMX), All rights reserved.
Publication Date
10-1-2014
Publication Date
01 Oct 2014
Citation Information
James R. Nicholas, Robert R. Meinders, K. Chandrashekhara, Greg Hilmas, et al.. "Polymer Infiltration and Pyrolysis Fabrication of SiC/SiC Composite for Nuclear Applications" Proceedings of the Composites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation (2014, Orlando, FL) (2014)
Available at: http://works.bepress.com/greg-hilmas/144/