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High Temperature Stability of MGCs Gas Turbine Components in Air and Combustion Gas Flow Environments

[+] Author Affiliations
Narihito Nakagawa, Hideki Ohtsubo, Kohji Shibata, Atsuyuki Mitani, Kazutoshi Shimizu

Ube Industries, Ltd., Ube City, Yamaguchi, Japan

Yoshiharu Waku

Engineering Research Association for High Performance Gas Turbine, Tokyo, Japan

Paper No. GT2004-53573, pp. 369-375; 7 pages
  • ASME Turbo Expo 2004: Power for Land, Sea, and Air
  • Volume 2: Turbo Expo 2004
  • Vienna, Austria, June 14–17, 2004
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4167-7 | eISBN: 0-7918-3739-4
  • Copyright © 2004 by ASME


Melt growth composites (MGCs) have a unique microstructure, in which continuous networks of single-crystal phases interpenetrate without grain boundaries. Therefore, the MGCs have excellent high-temperature strength characteristics, creep resistance, oxidation resistance and thermal stability in an air atmosphere at very high temperature. To achieve ultra-high thermal efficiency and low NOx emission for gas turbine systems, non-cooled turbine nozzle vanes and heat shield panels of combustor liners has been fabricated on an experimental basis. These components are thermally stable after heat treatment at 1700°C for 1000 hours in an air atmosphere. In addition, we have just started the exposure tests to evaluate the influence of combustion gas flow environment on MGCs.

Copyright © 2004 by ASME



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