Recent Developments in the Field of Thermal Barrier Coatings
Recent Developments in the Field of Thermal Barrier Coatings
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DOI：
10.1007/s11666-009-9312-7
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发表时间：
2009-03
影响因子：
3.1
通讯作者：
R. Vaßen;A. Stuke;D. Stöver
中科院分区：
文献类型：
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作者：
R. Vaßen;A. Stuke;D. Stöver
传统的热障涂层(TBC)系统包括金属粘结层和陶瓷隔热面层的双重结构。最近的几个研究活动集中在开发改进的粘合涂层或面漆材料；特别是面漆，那些降低导热系数的材料被研究。使用先进的面漆材料，陶瓷涂层可以进一步划分为不同功能的层。一个例子是双层系统，其中使用传统的氧化钇稳定的氧化锆(YSZ)作为底层，使用焦绿石或钙钛矿等新材料作为面层。与标准的YSZ相比，这些系统显示出更好的温度能力。此外，在TBC中还引入了新的功能。这些可以是感官特性，可用于改进温度控制，甚至用于监测剩余寿命。进一步提高应用温度也将导致进一步提高涂层的反射率，以减少通过TBC的辐射热传递。
Conventional thermal barrier coating (TBC) systems consist of a duplex structure with a metallic bondcoat and a ceramic, heat-isolative topcoat. Several recent research activities are concentrating on developing improved bondcoat or topcoat materials; for the topcoat especially, those with reduced thermal conductivity are investigated. Using advanced topcoat materials, the ceramic coating can be further divided into layers with different functions. One example is the double-layer system in which conventional yttria-stabilized zirconia (YSZ) is used as bottom and new materials such as pyrochlores or perovskites are used as topcoat layers. These systems demonstrated an improved temperature capability compared to standard YSZ. In addition, new functions are introduced within the TBCs. These can be sensorial properties that can be used for an improved temperature control or even for monitoring remaining lifetime. Further increased application temperatures will also lead to efforts for a further improvement of the reflectivity of the coatings to reduce the radiative heat transfer through the TBC.