热障涂层X射线显微镜三维成像

发布时间：2017-12-28 20:14

本文关键词：热障涂层X射线显微镜三维成像　出处：《稀有金属材料与工程》2016年12期 　论文类型：期刊论文

【摘要】：以双层结构热障涂层为研究对象,采用三维X射线显微镜、图像处理技术研究了热障涂层的形貌、组成、厚度、孔隙及孔隙率等三维结构特征。采用三维成像方法获得了高分辨率的热障涂层层状结构CT图像,用三维分割与提取法得到了陶瓷隔热层、粘结层和基体的三维形貌,定量分析了厚度、孔隙尺寸、孔隙数量及孔隙率等热障涂层重要表征参数。结果表明,三维X射线显微镜厚度分析结果与扫描电镜分析结果基本一致,孔隙率受重建精度影响。
[Abstract]:The three-dimensional structure characteristics of TBCs, such as morphology, composition, thickness, porosity and porosity, were studied by three-dimensional X ray microscope and image processing technology. The thermal barrier coating layer structure of high resolution CT images obtained by 3D imaging method, three-dimensional morphology of ceramic insulation layer, the bonding layer and the substrate is obtained by using 3D segmentation and extraction method, the quantitative analysis of the thickness, pore size, pore number and porosity to the characterization parameters of thermal barrier coatings. The results show that the results of the three-dimensional X ray microscope are basically the same as that of the scanning electron microscope, and the porosity is affected by the reconstruction precision.
【作者单位】：南昌航空大学;
【基金】：国家自然科学基金(51561025,61261031) 航空科学基金(2014ZF56022)
【分类号】：TG174.4
【正文快照】： 热障涂层(Thermal Barrier Coatings,TBCs)技术是先进航空发动机高温防护关键技术之一[1],涂层由隔热性能优良的陶瓷隔热面层和起粘结作用的抗氧化粘结层组成,具有典型的层状结构特征[2]。热障涂层制备方法主要有等离子喷涂法、电子束物理气相沉积法、超音速火焰喷涂法等。

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