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首页> 外文会议>International Conference on Surface Modification Technologies >Effect of Heat Treatment on Low Conductive Thermal Barrier Coatings
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Effect of Heat Treatment on Low Conductive Thermal Barrier Coatings

机译：热处理对低导电热阻挡涂层的影响

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Development of Thermal Barrier Coating (TBC) systems will allow higher combustion temperature which is of interest for all manufactures since it results in higher fuel efficiency and environmentally cleaner emissions. Low thermal conductivity and long service life are the most important properties of these coatings. The objective of the work presented in this paper was to study the influence of a long-term heat treatment (i.e. 1200°C/2000h) on different characteristics of atmospheric plasma sprayed TBCs. Two zirconia feedstock materials were evaluated, namely yttria partially stabilised zirconia and dysprosia partially stabilised zirconia. Several spray conditions were designed and employed in order to achieve different coating morphologies. Microstructure analyses revealed that the coating microstructure was significantly dependent on both operating conditions and heat treatment conditions. Significant changes in coatings porosity occurred during heat treatment. The lowest thermal conductivity was reached with the dysprosia partially stabilised zirconia material. All TBC systems experienced decomposition of the metastable t' phase during long heat treatment at 1200°C.
机译：热屏障涂层（TBC）系统的开发将允许对所有制造商感兴趣的更高的燃烧温度，因为它导致较高的燃料效率和环保净化的排放。导热率低，使用寿命长是这些涂层最重要的特性。本文提出的工作的目的是研究长期热处理（即1200℃/ 2000h）对大气等离子体喷涂TBC的不同特性的影响。评价了两个氧化锆原料材料，即氧化钇部分稳定的氧化锆和脱果部分稳定的氧化锆。设计并采用了几种喷雾条件，以实现不同的涂料形态。微观结构分析显示，涂层微观结构显着取决于操作条件和热处理条件。热处理过程中涂层孔隙率的显着变化。用脱果部分稳定的氧化锆材料达到最低的导热率。所有TBC系统在1200℃的长热处理期间经历了亚稳态T'相的分解。

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