24. Fabrication and Characterization of MGC Components for Ultra High Efficiency Gas Turbine

  1. Edgar Lara-Curzio
  1. Yoshiharu Waku1,
  2. Narihito Nakagawa2,
  3. Kenji Kobayashi3,
  4. Yasuhiko Kinoshita4 and
  5. Shinya Yokoi5

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291221.ch24

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2

How to Cite

Waku, Y., Nakagawa, N., Kobayashi, K., Kinoshita, Y. and Yokoi, S. (2008) Fabrication and Characterization of MGC Components for Ultra High Efficiency Gas Turbine, in Mechanical Properties and Performance of Engineering Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 2 (ed E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291221.ch24

Author Information

  1. 1

    HPGT Research Association 573-3 Okiube Ube City, Yamaguchi, 755-0001 Japan

  2. 2

    Ube Research Laboratory, Ube Industries, LTD Kogushi, Ube City, Yamaguchi, 755-0001 Japan

  3. 3

    Advanced Technology Department, Ishikawajima-Harima Heavy Industries, LTD Nishitokyo City, Tokyo, 188-8555 Japan

  4. 4

    Gas Turbine Research & Development Center, Kawasaki Heavy Industries, LTD. Kawasaki-Cho, Akashi City, 673-8666, Japan

  5. 5

    HPGT Research Association Nishitokyo City, Tokyo, 202-0023 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982329

Online ISBN: 9780470291221

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Keywords:

  • melt growth composites;
  • solidified ceramic composites;
  • structural materials;
  • raw material oxides;
  • micrograin superplasticity

Summary

Much attention has been paid to unidirectionally solidified ceramic composites as a candidate for a high-temperature structural material. We have recently developed eutectic composites, which are named as Melt Growth Composites (MGCs). The binary MGCs (Al2O3/YAG and Al2O3/GAP binary systems) have a novel microstructure, in which continuous networks of single-crystal Al2O3 phases and single-crystal oxide compounds (YAG or GAP) interpenetrate without grain boundaries. Therefore, the MGCs have excellent high-temperature strength characteristics, high creep resistance, superior oxidation resistance and thermal stability in the air atmosphere at very high temperatures.

Manufacturing processes for the MGCs are being examined under a Japanese national project, scheduled from 2001 - 2005. To achieve higher thermal efficiency for gas turbine systems, bowed stacking nozzle vanes have been fabricated on an experimental basis. The steady state temperature and thermal stress distribution on the surface of the bowed stacking nozzle have been analyzed. In addition, some properties of MGC components such as the thermal stability in an air atmosphere and the stability in water vapor at elevated temperatures are reported.