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Microstructure and Wear Behavior of Atmospheric Plasma-Sprayed AlCoCrFeNiTi High-Entropy Alloy Coating

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Abstract

Due to the advantages such as high strength, high hardness and good wear resistance, high-entropy alloys (HEAs) attracted more and more attentions in recent decades. However, most reports on HEAs were limited to bulk materials. Although a few of studies on atmospheric plasma-sprayed (APS) HEA coatings were carried out, the wear behavior, especially the high-temperature wear behavior of those coatings has not been investigated till now. Therefore, in this study, APS was employed to deposit AlCoCrFeNiTi high-entropy alloy coating using mechanically alloyed AlCoCrFeNiTi powder as the feedstock. The phase structure of the initial powder, the feedstock powder and the as-sprayed coating was examined by an x-ray diffractometer. The surface morphology of the feedstock powder and the microstructure of the as-sprayed coating were analyzed by field emission scanning electron microscopy and energy-dispersive spectroscopy. The bonding strength and the microhardness of the as-sprayed coating were tested. The wear behavior of the coating at 25, 500, 700 and 900 °C was investigated by analysis of the wear surface morphology and measurements of the volume wear rate and the coefficient of friction.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Number 51401091); and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions. The authors also appreciate the Institute of Nuclear Energy Safety Technology of Chinese Academy of Sciences in providing the field emission scanning electron microscopy.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu, China

    Li-Hui Tian, Wei Xiong, Chuan Liu, Sheng Lu & Ming Fu

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  1. Li-Hui Tian
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  2. Wei Xiong
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Correspondence to Li-Hui Tian.

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Tian, LH., Xiong, W., Liu, C. et al. Microstructure and Wear Behavior of Atmospheric Plasma-Sprayed AlCoCrFeNiTi High-Entropy Alloy Coating. J. of Materi Eng and Perform 25, 5513–5521 (2016). https://doi.org/10.1007/s11665-016-2396-6

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  • DOI: https://doi.org/10.1007/s11665-016-2396-6

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