Nanocrystalline high-entropy alloy (CoCrFeNiAl 0.3 ) thin-film coating by magnetron sputtering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Weibing Liao
  • Si Lan
  • Hongti Zhang
  • Jian Song

Detail(s)

Original languageEnglish
Pages (from-to)383-388
Journal / PublicationThin Solid Films
Volume638
Online published5 Aug 2017
Publication statusPublished - 30 Sep 2017

Abstract

High-entropy CoCrFeNiAl0.3 alloy thin films were prepared by magnetron sputtering technique. The thin film surface was very smooth and homogeneous. The synchrotron X-ray experiment confirmed that (111) type of texture existed in the thin film, and the structure was face-centered cubic nanocrystals with a minor content of ordered NiAl-type body-centered cubic structures. Interestingly, the elastic modulus of the thin film was nearly the same to the bulk single-crystal counterpart, however, the nanohardness is about four times of the bulk single-crystal counterpart. It was found that the high hardness was due to the formation of nanocrystal structure inside the thin films and the preferred growth orientation, which could be promising for applications in micro fabrication and advanced coating technologies.

Research Area(s)

  • High-entropy alloy, Mechanical properties, Nanocrystalline, Synchrotron X-ray scattering, Thin film coating