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首页> 外文期刊>International Journal of Clean Coal and Energy >Microstructural Degradation of Thermal Barrier Coatings on an Integrated Gasification Combined Cycle (IGCC) Simulated Film-Cooled Turbine Vane Pressure Surface Due to Particulate Fly Ash Deposition
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Microstructural Degradation of Thermal Barrier Coatings on an Integrated Gasification Combined Cycle (IGCC) Simulated Film-Cooled Turbine Vane Pressure Surface Due to Particulate Fly Ash Deposition

机译：由于颗粒飞灰沉积，在整体气化联合循环（IGCC）模拟的薄膜冷却式涡轮叶片压力表面上热障涂层的组织降解

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Research is being conducted to study the degradation of thermal barrier coatings (TBC) employed on IGCC turbine hot section airfoils due to particulate deposition from contaminants in coal syn-thesis gas (syngas). West Virginia University (WVU) had been working with US Department of Energy, National Energy Technology Laboratory (NETL) to simulate deposition on the pressure side of an IGCC turbine first stage vane. To simulate the contaminant deposition, several TBC coated, angled film-cooled test articles were subjected to accelerated coal fly ash, which was injected into the flow of a combustor facility with a high pressure (approximately 4 atm) and a high temperature (1560 K) environment. To investigate the degradation of the TBCs due to particulate deposition, non-destructive tests were performed using scanning electron microscopy (SEM) evaluation and energy dispersive X-ray spectroscopy (EDS) examinations. The SEM evaluation was used to display the microstructure change within the layers of the TBC system directly related to the fly ash deposition. The SEM micrographs showed that deposition-TBC interaction made the YSZ coating more susceptible to delamination and promoted a dissolution-reprecipitation mechanism that changed the YSZ morphology and composition. The EDS examination provided elemental maps of the shallow infiltration depth of the fly ash and chemical composition spectrum results which showed yttria migration from the YSZ into the deposition.
机译：正在进行研究以研究由于煤合成气（syngas）中的污染物造成的颗粒沉积而导致的IGCC涡轮机热段机翼上使用的隔热涂层（TBC）的降解。西弗吉尼亚大学（WVU）一直在与美国能源部的国家能源技术实验室（NETL）合作，以模拟IGCC涡轮一级叶片压力侧的沉积。为了模拟污染物的沉积，将几种TBC涂层的，成角度的薄膜冷却的测试制品置于加速的粉煤灰中，然后将其注入高压（约4 atm）和高温（1560 K）的燃烧室中。 ） 环境。为了研究由于颗粒沉积而导致的TBC降解，使用扫描电子显微镜（SEM）评估和能量色散X射线光谱（EDS）检查进行了无损检测。 SEM评估用于显示与粉煤灰沉积直接相关的TBC系统各层内的微观结构变化。 SEM显微照片表明，沉积-TBC相互作用使YSZ涂层更易于分层，并促进了溶解-再沉淀机制，从而改变了YSZ的形态和组成。 EDS检查提供了粉煤灰浅层渗透深度的元素图和化学成分光谱结果，这些结果表明氧化钇从YSZ迁移到沉积物中。

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