Chapter 53. Optimization of Sintering Aids in Silicon Nitrides for Cutting Tool Application

  1. J. P. Singh
  1. R. D. Nixon1 and
  2. P. K. Mehrotra2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch53

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

How to Cite

Nixon, R. D. and Mehrotra, P. K. (1997) Optimization of Sintering Aids in Silicon Nitrides for Cutting Tool Application, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294444.ch53

Author Information

  1. 1

    Kennametal Inc., 100 Kennametal Rd., Roanoke Rapids, NC27870

  2. 2

    Kennametal Inc., P. O. Box 231, Latrobe, PA 15650

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

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Keywords:

  • microstructure;
  • physical properties;
  • characteristics;
  • sintering;
  • thermal conductivity

Summary

The objective of this paper is to correlate the microstructure and properties of silicon nitrides to their use as cutting tools. Two commercially available Si3N4-based ceramics were analyzed to determine the types and amounts of sintering aids used for densification. Several key mechanical and physical properties were evaluated, followed by metalcutting test in milling gray cast iron. The results indicate that lower amounts of sintering aids and finer grain size may improve fracture and wear related properties and metalcutting performance. These observations are discussed to understand the relationships between material characteristics and performance.