Chapter 69. Shaping Srbsn Parts by a Closed-Mold Casting Method

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Gary M. Crosbie and
  2. G. T. Bretz

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch69

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Crosbie, G. M. and Bretz, G. T. (2000) Shaping Srbsn Parts by a Closed-Mold Casting Method, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch69

Author Information

  1. SRL Bldg. MD 3182 SRL Research Laboratory, Ford Motor Company, Dearborn, MI 48121–2053

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • structural ceramics;
  • sinterable reaction bonded silicon nitride;
  • high green strength;
  • reproducibly low green density;
  • minimize sintering distortion.

Summary

As markets grow for structural ceramics, sinterable reaction bonded silicon nitride (SRBSN) continues to gain interest due to the low cost of its precursor, silicon. A forming process for complex SRBSN shapes has been developed which offers the closed-mold capability of gelcasting, but without the costs associated with polymerization and polymer burn-out. In a preferred case, a glycol-based slurry of yttrium carbonate is added to a high-solids aqueous slurry of silicon powder. The body solidifies to high green strength as Y3+ ions flocculate the Si suspension, to obtain reproducibly-low green density silicon shapes for nitriding.