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首页> 外文会议>ASME turbo expo >COMPARATIVE PERFORMANCE OF A THERMAL BARRIER COATING SYSTEM UTILIZING PLATINUM ALUMINIDE BOND COAT ON ALLOYS CMSX-4~® AND MAR M~® 002DS
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COMPARATIVE PERFORMANCE OF A THERMAL BARRIER COATING SYSTEM UTILIZING PLATINUM ALUMINIDE BOND COAT ON ALLOYS CMSX-4~® AND MAR M~® 002DS

机译：在合金CMSX-4〜®和MAR M〜®002DS上使用铝化铂粘结层的热障涂层系统的比较性能

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摘要

It is known that the relative performance of thermal barrier coatings is largely dependent upon the oxidation properties of the bond coat utilized in the system. Also, the oxidation properties of diffusion-type bond coats (aluminides and their modifications) are functions of the superalloy substrate used in blade applications. Therefore, the performance of a given coating system utilizing a diffusion-type bond coat can significantly vary from one superalloy to another. Toward the objective of developing coating systems with more universal applicability, it is essential to understand the mechanisms by which the superalloy substrate can influence the coating performance. In this study, we examined the relative performance of yttria-stabilized zirconia/platinum aluminide coating system on alloys CMSX-4 and MAR M 002DS representing single-crystal and directionally-solidified alloy systems respectively using thermal exposure tests at 1150°C with a 24-hour cycling period to room temperature. Changes in coating microstructure were characterized by various electron-optical techniques. Experiment showed that the coating system on alloy MAR M 002DS had outperformed that on alloy CMSX-4, which could be related to the high thermal stability of the bond coat on alloy MAR M 002DS. From a detailed microstructural characterization, this difference in behavior could be explained at least partially in terms of variation in chemical composition of the two alloys, which was also reflected on the exact failure mechanism of the coating system.
机译：众所周知，热障涂层的相对性能在很大程度上取决于系统中所用粘结涂层的氧化性能。而且，扩散型粘结涂层（铝化物及其改性）的氧化性能是叶片应用中使用的高温合金基材的功能。因此，使用扩散型粘结涂层的给定涂层系统的性能可能会从一种超级合金到另一种超级合金显着变化。为了开发具有更高通用性的涂层系统，必须了解超级合金基体可以影响涂层性能的机理。在这项研究中，我们使用1150°C和24的热暴露测试，分别在代表单晶和定向凝固合金系统CMSX-4和MAR M 002DS的合金上检查了氧化钇稳定的氧化锆/铝化铂涂层系统的相对性能。小时的循环时间达到室温。涂层微结构的变化通过各种电子光学技术来表征。实验表明，MAR M 002DS合金的涂层性能优于CMSX-4合金，这可能与MAR M 002DS合金上的粘结涂层的高热稳定性有关。通过详细的微观结构表征，可以至少部分根据两种合金的化学成分变化来解释这种行为差异，这也反映在涂层系统的确切失效机理上。

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