Acta Metallurgica Sinica (English Letters) ›› 2021, Vol. 34 ›› Issue (11): 1537-1545.DOI: 10.1007/s40195-021-01255-9

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A Novel High-Entropy Amorphous Thin Film with High Electrical Resistivity and Outstanding Corrosion Resistance

Chuang-Shi Feng1,2, Tian-Wei Lu1,3, Tian-Li Wang1,2, Man-Zhen Lin1, Junhua Hou4, Wenjun Lu4, Wei-Bing Liao1()   

  1. 1College of Physics and Optoelectronic Engineering,Shenzhen University, Shenzhen 518060, China
    2College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
    3Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, China
    4Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China
  • Received:2021-01-20 Revised:2021-03-29 Accepted:2021-04-02 Online:2021-05-26 Published:2021-05-26
  • Contact: Wei-Bing Liao
  • About author:Wei-Bing Liao, liaowb@szu.edu.cn
    First author contact:Chuang-Shi Feng and Tian-Wei Lu are contributed equally to this work.

Abstract:

This study explores a novel WNbMoTaV high-entropy thin film (HETF) in amorphous structure via pulsed laser deposition system. The formation of amorphous structure of this high-entropy alloy is ascribed to the high cooling rate during the deposition process. The HETF shows a smooth surface with a height fluctuation of less than 13 nm. This film has a high electrical resistivity of ~ 320.6 μΩ∙cm and a low corrosion current density of 0.088 μA/cm2. The corrosion resistance of the HETF at ambient temperature is superior to the conventional AISI 316L stainless steel. The high electrical resistivity and excellent corrosion resistance of the HETF are mainly attributed to its chemical disorder, cocktail effect and homogeneous amorphous structure. This experimental phenomenon not only provides a basis for the preparation of amorphous alloy films with low glass forming ability by pulsed laser deposition system, also promotes the potential application of WNbMoTaV HETF in the microelectronic components as resistivity sensors.

Key words: High-entropy alloys, Thin films, Electrical resistivity, Microstructures, Corrosion behaviors