Chapter 52. Phase Transformation and Microstructure in the Mixed Cations of α′/β′-SiAlON Composite

  1. J. P. Singh
  1. Tzer-Shin Sheu

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch52

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

Sheu, T.-S. (1997) Phase Transformation and Microstructure in the Mixed Cations of α′/β′-SiAlON Composite, 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.ch52

Author Information

  1. Department of Materials Engineering, Kaohsiung Polytechnic Institute Kaohsiung, Taiwan

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:

  • sinterabilities;
  • composition;
  • cation system;
  • homogenizer;
  • decomposition

Summary

Mixed cations (Ca, Li), (Ca, Y), (Li, Y), and (Ca, Li, Y) of oxides were used as sintering additives for fabricating the α′/β′-SiAlON composite. Sintering behavior, phase content, and microstructure of this mixed-cation composite were studied. By partially replacing the role of Y+3 in the sintering additive, the (Li, Y)-SiAlON composite showed better sinterabilities than the (Ca, Y)-SiAlON composite. With a low amount of sintering additive, the α′-SiAlON phase was not formed in the mixed-cation α′/β′-SiAlON composite. Mixed cations (Ca, Li) were used as sintering additives for making different phase contents of α′/β′-SiAlON composite. Furthermore, morphology of the elongated β′-SiAlON grain was observed in the different mixed cation systems.