Chapter 57. Effect of Sintering Atmosphere on the Microstructure Evolution and Mechanical Properties of Silicon Carbide Ceramics

  1. J. P. Singh
  1. Hyung-Woo Jun1,
  2. Hae-Weon Lee1,
  3. Gyeung-Ho Kim1,
  4. Heu-Sup Song1 and
  5. Byung-Ho Kim2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch57

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

Jun, H.-W., Lee, H.-W., Kim, G.-H., Song, H.-S. and Kim, B.-H. (2008) Effect of Sintering Atmosphere on the Microstructure Evolution and Mechanical Properties of Silicon Carbide Ceramics, 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.ch57

Author Information

  1. 1

    Korea Institute of Science and Technology, Cheongrang, Seoul, Korea

  2. 2

    Korea University, Dept. of Mat. Eng., Songbuk-gu, Seoul, Korea

Publication History

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

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

SEARCH

Keywords:

  • manipulating;
  • densification;
  • solution-reprecipitation process;
  • formation;
  • sintering

Summary

The densification and grain growth behaviors of β-SiC were investigated using nitrogen containing liquids by manipulating sintering atmosphere and/or by adding AIN to Al2O3-Y2O3 liquid phase sintering aids. In general, N2 atmosphere retarded β[RIGHTWARDS ARROW]α phase transformation and grain growth, while Ar atmosphere enhanced β[RIGHTWARDS ARROW]α phase transformation and the formation of plate like grains. When the sintering was carried out in N2/Ar atmosphere, substantially improved flexural strength SiC was obtained due to higher sintered density and fine grain size. AIN addition also showed a similar influence on densification behavior to the switching atmosphere. Nitrogen containing liquid is likely to inhibit phase transformation and grain growth by being incorporated into the lattice and to improve densification by retention of higher liquid amount due to higher viscosity.