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<p>FeCoCrMnNiN<sub><i>x</i></sub> high entropy nitride ceramics thin films were prepared using the magnetron sputtering method, and the effects of nitrogen content on the thin films’ properties were later examined. The addition of N<sub>2</sub> affected the microstructures of the thin films and their mechanical and corrosion properties. Compared with the FeCoCrMnNi thin films with 1-sccm N<sub>2</sub>, the addition of 2 and 3 sccm of N<sub>2</sub> by as much as 5.45at% and 6.34at% changed the solid solution’s crystalline structure into an amorphous structure. The addition of nitrogen caused drastic changes to the surface morphology, creating a smoother and more uniform surface without cauliflower units. The atomic force microscopy image analysis indicated that the addition of nitrogen reduced the surface roughness from 5.58 to 1.82 nm. Adding N<sub>2</sub> to the CoCrFeMnNi thin film helped increase its mechanical properties, such as hardness and strength, while the Young’s modulus decreased. The hardness of (8.75 ± 0.5) GPa and the reduced Young’s modulus of (257.37 ± 11.4) GPa of the FeCoCrMnNi thin film reached (12.67 ± 1.2) and (194.39 ± 12.4) GPa, respectively, with 1 sccm N<sub>2</sub>. The applied coating of the CoCrFeMnNi thin film on 304SUS increased the corrosion resistance, whereas the addition of nitrogen to the CoCrFeMnNi thin film also improved its corrosion resistance compared with that of the CoCrFeMnNi thin film without nitrogen.</p>

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Effect of nitrogen addition on the structural, mechanical and corrosion properties of FeCoCrMnNiNx high-entropy nitride ceramic thin films

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Mehdi Boroujerdnia,
  • Ali Obeydavi

摘要

FeCoCrMnNiNx high entropy nitride ceramics thin films were prepared using the magnetron sputtering method, and the effects of nitrogen content on the thin films’ properties were later examined. The addition of N2 affected the microstructures of the thin films and their mechanical and corrosion properties. Compared with the FeCoCrMnNi thin films with 1-sccm N2, the addition of 2 and 3 sccm of N2 by as much as 5.45at% and 6.34at% changed the solid solution’s crystalline structure into an amorphous structure. The addition of nitrogen caused drastic changes to the surface morphology, creating a smoother and more uniform surface without cauliflower units. The atomic force microscopy image analysis indicated that the addition of nitrogen reduced the surface roughness from 5.58 to 1.82 nm. Adding N2 to the CoCrFeMnNi thin film helped increase its mechanical properties, such as hardness and strength, while the Young’s modulus decreased. The hardness of (8.75 ± 0.5) GPa and the reduced Young’s modulus of (257.37 ± 11.4) GPa of the FeCoCrMnNi thin film reached (12.67 ± 1.2) and (194.39 ± 12.4) GPa, respectively, with 1 sccm N2. The applied coating of the CoCrFeMnNi thin film on 304SUS increased the corrosion resistance, whereas the addition of nitrogen to the CoCrFeMnNi thin film also improved its corrosion resistance compared with that of the CoCrFeMnNi thin film without nitrogen.