イオンビーム応用電子ビーム蒸着法で形成した柱状組織セラミック層と酸化防止アルミナ層を有する遮熱コーティングの耐久性

概要

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In the development of high durable Thermal Barrier Coating (TBC) for gas turbines, thermal stress relief of ceramic topcoat and growth suppression of thermally grown oxide (TGO) formed on top boundary are important technical subjects. In this paper, it was investigated that a trial production and a heat cycle test of the columnar structure ceramic topcoat TBC by Ion-beam assisted EB-PVD advantageous to thermal stress relief. Furthermore, columnar structure TBC applied Al2O3 barrier layer was investigated for the growth suppression of TGO. Consequently, the columnar structure TBC showed the excellent heat cycle durability compared with plasma sprayed TBC. It was shown that the columnar structure TBC applied Al_2O_3 barrier layer could suppress TGO growth to half in thickness.
社団法人日本ガスタービン学会の論文
2005-11-20