| 摘要 |
A coating system 14 for Si-containing materials, particularly those for articles exposed to high temperature such as gas turbine components. The coating system exhibits improved resistance to corrosion from sea salt and CMAS as a result of using aluminate compounds to protect silicate-containing layers 20,22 of the coating system. The coating system includes an environmental barrier coating 22, a thermal barrier coating 18 overlying the environmental barrier coating and formed of a thermal-insulating material, and a transition layer 24 between the environmental barrier coating and thermal barrier coating, characterized in that the transition layer contains at least one aluminate compound selected from YAIO3, Y3AI5O12, NbAIO4, TaAIO4, SrAI2O4, CaAI2O4, CaAI4O7, SrLaAIO3, MgAI2O4, ScAIO3 and/or alumina. The transition layer may have a composition gradient if more than one component is present.
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