Chapter 43. Interface Reactions between Beta-Sialons and Cu/Cu2O

  1. John B. Wachtman Jr.
  1. J. Persson and
  2. M. Nygren

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313053.ch43

14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10

14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10

How to Cite

Persson, J. and Nygren, M. (1990) Interface Reactions between Beta-Sialons and Cu/Cu2O, in 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313053.ch43

Author Information

  1. Inorganic Chemistry Arrheniuslab, University of Stockholm, S-106 91 Stockholm, Sweden

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780470374931

Online ISBN: 9780470313053

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Keywords:

  • ceramics;
  • vacuum;
  • metallic;
  • crystalline;
  • amorphous

Summary

Fully dense β-sialons with different z-values according to the formula Si6-2Al2O2N8-2 have been prepared, with and without addition of a sintering aid (Y2O3). The sialon ceramics were heat-treated in vacuum at 1000°C, embedded in Cu, Cu2O, and in a Cu/Cu2O mixture. The reaction zones formed have been studied by means of an SEM equipped with an EDS system and with use of X-ray powder diffraction technique. No reaction between pure Cu and the β-sialon could be observed, but the reaction between the Cu/C2O mixture and the δ-sialons is severe. For sialons with low z-values, Cu2O reacts with the sialons to form a glassy phase containing Si, Al, and Cu. Simultaneously, one part of the Cu2O is reduced to Cu; meanwhile, the sialons are oxidized with the formation of N2. With increasing z-value, less Cu and more CuAlO2 is formed. Similar reaction products are formed when Cu2O is used as matrix, but no Cu seems to be formed during the reaction with sialons of z = 3.8.