68. Corrosion Mechanism of Lu2Si2O7 Phase in Static State Water Vapor Environment

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. Shunkichi Ueno,
  2. D. Doni Jayaseelan,
  3. Naoki Kondo,
  4. Tatsuki Ohji and
  5. Shuzo Kanzaki

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291191.ch68

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

Ueno, S., Jayaseelan, D. D., Kondo, N., Ohji, T. and Kanzaki, S. (2004) Corrosion Mechanism of Lu2Si2O7 Phase in Static State Water Vapor Environment, 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.ch68

Author Information

  1. Synergy Materials Research Center, National Institute of Advanced Industrial Science and Technology, 2268-1 Shimo-Shidami, Moriyama-ku, Nagoya 463-8687 Japan

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:

  • non-oxide ceramic materials;
  • silicon hydroxides;
  • energy production;
  • corrosion tests;
  • alumina

Summary

The recession mechanism of Lu2Si2O7 phase was examined at 1300°C in water vapor environment. Corrosion test was performed on hot-pressed polycrystalline Lu2Si2O7 and mullite/Lu2Si2O7 eutectic samples. The boundary silica phase was easily corroded by water vapor attack for hot-pressed Lu2Si2O7 sample with a weight loss rate of 1.4×10−6 g/cm2h. Lu-rich component was firstly melted down and then the melted component was vaporized by water vapor. On the other hand, no weight change was observed for the eutectic sample. A part of Lu2Si2O7 phase was decomposed and the polycrystalline phase was observed.