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首页> 外文期刊>Journal of Materials Engineering and Performance >Elevated Temperature Solid Particle Erosion Performance of Plasma-Sprayed Co-based Composite Coatings with Additions of Al2O3 and CeO2
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Elevated Temperature Solid Particle Erosion Performance of Plasma-Sprayed Co-based Composite Coatings with Additions of Al2O3 and CeO2

机译：加入Al2O3和CeO2的等离子体喷涂的CO基复合涂层的升高的温度固体颗粒腐蚀性能

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摘要

In this paper, investigation into solid particle erosion behavior of atmospheric plasma-sprayed composite coating of CoCrAlY reinforced with Al2O3 and CeO2 oxides on Superni 76 at elevated temperature of 600 degrees C is presented. Alumina particles are used as erodent at two impact angles of 30 degrees and 90 degrees. The microstructure, porosity, hardness, toughness and adhesion properties of the as-sprayed coatings are studied. The effects of temperature and phase transformation in the coatings during erosion process are analyzed using XRD and EDS techniques. Optical profilometer is used for accurate elucidation of erosion volume loss. CoCrAlY/CeO2 coating showed better erosion resistance with a volume loss of about 50% of what was observed in case of CoCrAlY/Al2O3/YSZ coating. Lower erosion loss is observed at 90 degrees as compared to 30 degrees impact angle. The erosion mechanism evaluated using SEM micrograph revealed that the coatings experienced ductile fracture exhibiting severe deformation with unusual oxide cracks. Reinforced metal oxides provide shielding effect for erodent impact, enabling better erosion resistance. The oxidation of the coating due to high-temperature exposure reforms erosion process into oxidation-modified erosion process.
机译：本文介绍了在600℃升高的温度下，对600℃的高温76上加固的环阵容的固体颗粒喷涂复合涂层的固体颗粒侵蚀性能的研究。氧化铝颗粒用作30度和90度的两个冲击角蚀刻。研究了喷涂涂层的微观结构，孔隙，硬度，韧性和粘附性能。使用XRD和EDS技术分析了侵蚀过程中涂层温度和相变的影响。光学型仪表用于精确阐明侵蚀体积损失。可环比/ CeO2涂层显示出在可环比/ Al 2 O 3 / YSZ涂层的情况下观察到的侵蚀性耐受损失约50％。与30度的冲击角相比，在90度观察到较低的侵蚀损失。使用SEM显微照片评估的侵蚀机制显示，涂层经历了具有不寻常的氧化物裂缝的严重变形的延性骨折。增强金属氧化物为腐蚀抗冲击提供屏蔽效果，从而实现更好的抗腐蚀性。高温暴露的涂层氧化在氧化改性侵蚀过程中改变腐蚀过程。

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