6. Mechanical Properties of Pressureless Sintered SiC-AIN Composites Obtained without Sintering Bed

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. G. Magnani1 and
  2. L. Beaulardi2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291191.ch6

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

How to Cite

Magnani, G. and Beaulardi, L. (2008) Mechanical Properties of Pressureless Sintered SiC-AIN Composites Obtained without Sintering Bed, in 28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291191.ch6

Author Information

  1. 1

    ENEA Bologna Research Center Via dei Colli 16 40136 Bologna Italy

  2. 2

    ENEA Faenza Research Center Via Ravegnana 186 48018 Faenza (Ra) Italy

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2004

ISBN Information

Print ISBN: 9780470051528

Online ISBN: 9780470291191

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Keywords:

  • silicon carbide;
  • aluminium nitride;
  • x-ray difiactometry;
  • oxidation behaviour;
  • oxygen analysis

Summary

High density (>98% T. D.) SiC-AIN composites were obtained by means of a pressureless sintering process which did not require the powder bed to protect sample against weight loss. Sintered sample showed a fine microstructure formed by 2H SiC-AIN solid solution with Y10Al2Si3O18N4 as grain boundary phase. Mechanical properties (hardness, toughness and flexural strength) were determined and compared to the properties of SiC-AIN sample obtained with different sintering processes (hot pressing, gas pressure sintering, pressureless sintering with powder bed). Microstructural analysis confirmed that a mullite scale protects material against oxidation up to 1400°C.