Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 827, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.153836
Keywords
High-entropy alloys; High-entropy nitrides; Magnetron sputtering; Corrosion resistance
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Funding
- National Natural Science Foundation of China [51775539, 51905524, U1737214]
- National Key R&D Program of China [2018YFB2000300]
- AcademicianWorkstation Building Project of GuangXi Zhuang Autonomous Region Scientific and Technological Department [[2014] 91]
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The VAlTiCrMo and (VAlTiCrMo)N-x coatings were prepared by sputtering V-Al-Ti-Cr-Mo splicing targets. The microstructure and chemical composition were analyzed by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and transmission electron microscope (TEM). The high-entropy alloy coating and the corresponding nitride coating have body-centered cubic (BCC) and face-centered cubic (FCC) structures respectively. Nitriding changes the phase structure and growth mode of the high-entropy coating, and the synthesized high-entropy nitride coatings are more compact. Meanwhile, the introduction of nitrogen leads to severe lattice distortion, which improves the mechanical properties of the high-entropy coating. As the nitriding degree increases, the corrosion resistance of the high-entropy nitride coatings in 3.5 wt% NaCl solution is improved. The synthesized (VAlTiCrMo)Nx coating exhibits optimized mechanical properties and nobler corrosion resistance when the N-2 flow is 800 sccm. (C) 2020 Elsevier B.V. All rights reserved.
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