1824 CoNiCrAIYへのCe及びSi添加による熱遮へいコーティングの酸化挙動評価(J07-1 溶射皮膜の組織,形態,J07 溶射皮膜の組織制御と特性評価)

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Thermally grown oxide (TGO) forms at the interface between the top coating and bond coating during service. Delamination or spallation at the interface can be occurred by the TGO formation and growth. Therefore, formation and growth behavior of TGO were considered. Modifications of the bond coating materials are one means to inhibit the TGO formation and to improve the bond strength of TBC. In this study, morphologies of TGO were controlled by Ce and Si addition to conventional CoNiCrAlY bond coating material. As a result, when the TBCs with Ce added bond coating materials were aged at 1100℃ for 100 hours, morphologies of TGO were changed drastically. It is hoped that the morphologies can improve bond strength of TBCs.
2005-09-18