等离子喷涂常规和纳米热障涂层隔热性能
Thermal Insulation Capability of Plasma-sprayed Conventional and Nanostructured ZrO2-7%Y2O3 Thermal Barrier Coating
王东生，田宗军，杨斌，黄因慧
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作者单位：铜陵学院机械工程系
中文关键字：等离子喷涂；热障涂层；纳米涂层；隔热性能
英文关键字：plasma spraying; thermal barrier coating; nanostructured coating; thermal insulation capability
中文摘要：采用等离子喷涂工艺在TiAl合金表面制备常规和纳米ZrO2-7%Y2O3(质量分数)热障涂层，分析了两种涂层的组织结构，并对其隔热性能进行了比较。结果表明，等离子喷涂常规热障涂层呈典型的层状堆积特征，而纳米涂层为特殊的两相结构。相对于常规涂层，纳米涂层有较好的隔热性能。在1100℃时，等离子喷涂常规及纳米涂层的隔热温度分别为83℃和127℃。
英文摘要：Conventional and nanostructured ZrO2-7%Y2O3 (mass fraction) thermal barrier coatings (TBCs) were deposited on TiAl base alloy substrates by the plasma spraying technique. The microstructures and thermal insulation capability of the two types of coatings were comparatively researched. The results show that the tradition coating has a typical laminated structure. However, the nanostructured coating exhibits a bimodal microstructure consisted of fully melted regions and partially melted regions. The nanostructured coating has better thermal barrier effect than the conventional coating. The temperature drops of conventional and nanostructured coatings measured at 1100 ℃ are 83 ℃ and 127 ℃ respectively.