Journal of Materials Science

, Volume 29, Issue 23, pp 6320–6328 | Cite as

The influence of preceramic binders on the microstructural development of silicon nitride

  • S. T. Schwab
  • C. R. Blanchard
  • R. C. Graef
Article
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Accepted:

Abstract

A number of polymeric precursors to silicon nitride were prepared and evaluated as binders in cold pressing/pressureless sintering operations. These polymers exhibited ceramic yields in excess of 75% by weight, and powder compacts made using them as binders displayed improved green handling properties. Compacts pyrolysed at 800 °C exhibited unusual microstructures, including the development of whiskers in situ. Based on microstructural observation, compacts sintered under pressureless conditions appeared to show enhanced densification relative to those processed without preceramic binders. Preceramic binders appeared to enhance the formation of β-Si3N4 and may enhance densification of compacts sintered under pressureless conditions.

Keywords

Polymer Silicon Microstructure Nitride Powder Compact 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • S. T. Schwab
    • 1
  • C. R. Blanchard
    • 1
  • R. C. Graef
    • 1
  1. 1.Department of Materials SciencesSouthwest Research InstituteSan AntonioUSA

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