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Metallography, Microstructure, and Analysis
Erschienen in: Metallography, Microstructure, and Analysis 5/2019

10.09.2019 | Technical Article

Oxidation Behavior of Thermally Grown Oxide on Aluminized Coating Irradiated by High-Current Pulsed Electron Beam

verfasst von: Zhi-Yong Han, Wen-Xin Shi, Zhe Wang, Kun-Ying Ding, Tao-tao Cheng, Yan-yan Ren

Erschienen in: Metallography, Microstructure, and Analysis | Ausgabe 5/2019

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Abstract

The oxidation of CoCrAlY coatings, which are prepared by atmospheric plasma spray, additionally aluminized by electric beam vacuum deposition, and finally modified by high-current pulsed electron beam irradiation, is investigated. Meanwhile, the isothermal oxidation performance of untreated coating at 1050 °C is compared to the modified coating. The surface microstructure, cross-sectional microstructure, and phase transformation of the coatings are characterized by means of scanning electron microscope and energy-dispersive spectrometry (EDS). Results reveal that the thermally grown oxide (TGO) in untreated coatings is composed of two distinct layers: a large amount of mixed gray oxides in the outer layer and a thin Al2O3 film in the inner layer. In comparison, modified coatings exhibit single TGO layer and homogeneous TGO composition. The EDS line scanning result shows that TGO is primarily comprised of α-Al2O3. These results display that the modified coatings have a much higher oxidation resistance.
Vorheriger Artikel Friction Stir Spot Vibration Welding: Improving the Microstructure and Mechanical Properties of Al5083 Joint
Nächster Artikel Microstructure Evolution and Tensile Behavior of Dissimilar Friction Stir-Welded Pure Copper and Dual-Phase Brass

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Metadaten
Titel
Oxidation Behavior of Thermally Grown Oxide on Aluminized Coating Irradiated by High-Current Pulsed Electron Beam
verfasst von
Zhi-Yong Han
Wen-Xin Shi
Zhe Wang
Kun-Ying Ding
Tao-tao Cheng
Yan-yan Ren
Publikationsdatum
10.09.2019
Verlag
Springer US
Erschienen in
Metallography, Microstructure, and Analysis / Ausgabe 5/2019
Print ISSN: 2192-9262
Elektronische ISSN: 2192-9270
DOI
https://doi.org/10.1007/s13632-019-00572-x

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