Characterization of oxidized Ni-based superalloys by GD-OES,Journal of Analytical Atomic Spectrometry

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Characterization of oxidized Ni-based superalloys by GD-OES
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2017-04-13 00:00:00 , DOI: 10.1039/c7ja00069c
W. J. Nowak _{1,

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Affiliation

In this work, the analysis of various high-temperature materials after oxidation using Glow Discharge Optical Emission Spectrometry (GD-OES) will be presented. The results of depth profiles of four Ni-based superalloys that form different oxide scales after oxidation at high temperatures will be shown. It was determined that GD-OES is a very flexible method allowing for analysis of different types of oxide scales formed on the alloys after operation. This method enables analysis of the oxides varying in chemical composition, as well as thickness (ranging between a few μm up to 150 μm). It will be shown that the GD-OES method is not only suitable for analysis of oxide scales, but also for studying protective coatings on a superalloy substrate, commonly used in the hot sections of gas turbines or jet engines. It was found that the GD-OES technique allows to obtain depth-resolved information with relatively good depth resolution at very thick layers, where other techniques fail due to e.g. sputtering time. The presence of precipitates and laterally inhomogeneous oxides additionally excludes other techniques with high lateral resolution. The results of GD-OES analysis will be confirmed by other analytical techniques, such as light optical microscopy (LOM) and scanning electron microscopy (SEM).

中文翻译：

GD-OES表征氧化的镍基高温合金

在这项工作中，将介绍使用辉光放电光发射光谱法（GD-OES）分析氧化后的各种高温材料。将显示四种在高温下氧化后形成不同氧化皮的镍基高温合金的深度剖面结果。已确定GD-OES是一种非常灵活的方法，可以分析操作后在合金上形成的不同类型的氧化皮。这种方法可以分析化学成分以及厚度（介于几微米至150微米之间）变化的氧化物。结果表明，GD-OES方法不仅适用于氧化皮的分析，还适用于研究高温合金基体上的保护涂层，通常用于燃气轮机或喷气发动机的高温区域。例如溅射时间。析出物和横向不均匀氧化物的存在还排除了其他具有高横向分辨率的技术。GD-OES分析的结果将通过其他分析技术得到确认，例如光学显微镜（LOM）和扫描电子显微镜（SEM）。

更新日期：2017-04-13

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