OS6-9 TBCを適用したガスタービン動翼の実機使用による損傷(OS6 設備診断・運用保全技術,分散と集中の共存)

概要

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This paper describes the effect of in-service exposure on thermal barrier coatings and Ni-base alloy substrates of 1300℃-class gas turbine blades. We have inspected the commercially operated gas turbine blades coated by thermal barrier coatings. By the cross-sectional analysis, small delamination and vertical cracks of the coatings were observed at the leading edge and platform position. Near the coating delamination position, formation of thermally grown oxides in the coatings and coarsening of γ' phases in the substrates were occurred. Creep rupture and fatigue lives in the substrates at high temperatures were almost the same as unexposed ones. Then, the substrates of the inspected blades were slightly degraded in this study.
社団法人日本機械学会の論文
2006-06-28