Degradation of gas turbine blade materials in integrated coal-gasification combined cycle plant

Authors: Wada, K.; Yan, L.; Takahashi, M.; Takaishi, K.; Furukawa, T.

Source: Materials at High Temperatures, Volume 18, Number 2, May 2001 , pp. 131-138(8)

Publisher: Science Reviews 2000 Ltd

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Abstract:

Interest in the integrated coal-gasification combined cycle plant (IGCC) has increased because of its high efficiency. However, degradation of gas turbine component materials has not been studied so far. Therefore, the purpose of this study is to investigate the corrosion behaviors of these materials in an actual coal gas combustion environment. Our test facility was constructed near the coal-gasification test facility (CGT) at the Aioi works of Ishikawajima-Harima Heavy Industries Co. Ltd. Several superalloy (René80H and FSX414) and coating systems (CoCrAlY, CoNiCrAlY and TBC) were exposed in the coal gas combustion environment at 1123, 1223 and 1323 K up to 350 h. After these tests, the weight change of each specimen was measured. Morphologies of products and element distributions at their surfaces were observed with SEM and EPMA. It is concluded that not only high- temperature oxidation and sulfidation but also ash deposition has a remarkable influence on the degradation of gas turbine blade materials.

Keywords: integrated gas turbine blade materials

Document Type: Research article

DOI: http://dx.doi.org/10.3184/096034001783640649

Affiliations: 1: Toshiba Corporation, Power & Industrial Systems Research and Development Center, 2-4 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan

Publication date: 2001-05-15

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Materials at High Temperatures serves the needs of those who develop and use materials for high temperature applications. It publishes peer reviewed contributions relating to high temperature applications in the power, chemical, engine, processing and furnace industries.
The effects of high temperatures on corrosion, fatigue, creep, strength and wear in alloys, intermetallics, ceramics, refractories and composites are covered. Papers dealing with aspects of materials usage including modelling of behaviour and life prediction will be particularly welcome. The journal has a policy of emphasizing practical aspects and authors presenting results from research programmes are encouraged to relate these, if possible, to actual or potential applications.
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Degradation of gas turbine blade materials in integrated coal-gasification combined cycle plant

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