Chapter 44. Combustion Synthesis of NbSi2 and Nb(Si1-x, Alx)2

  1. Don Bray
  1. S. B. Bhaduri,
  2. J. G. Huang and
  3. S. Bhaduri

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch44

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

How to Cite

Bhaduri, S. B., Huang, J. G. and Bhaduri, S. (2008) Combustion Synthesis of NbSi2 and Nb(Si1-x, Alx)2, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294482.ch44

Author Information

  1. University of Idaho Moscow, ID 83844-3024

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470375587

Online ISBN: 9780470294482

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Keywords:

  • exothermic;
  • velocity;
  • stoichiometric;
  • microscopy;
  • thermodynamic

Summary

Combustion synthesis reactions were ignited in the Nb-Si-Al ternary system by adding Al to Nb-2Si stoichiometric composition. The motivation was to increase the exothermicity of the stoichiometric reaction, which is on the borderline of being self propagating. The data reported clearly shows that it is possible to achieve this objective. The as-synthesized powders were characterized by X-ray diffraction and Scanning electron microscopy. The XRD patterns show the formation of the C40 structures for all compositions. The compositions containing the most Al also show some amount of C54 structure formation. SEM pictures revealed considerable inhomogeneity.