Hierarchical nanostructure of CrCoNi film underlying its remarkable mechanical strength

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

View graph of relations

Author(s)

  • Yujie Chen
  • Zhifeng Zhou
  • Paul Munroe
  • Zonghan Xie

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number081905
Journal / PublicationApplied Physics Letters
Volume113
Issue number8
Publication statusPublished - 20 Aug 2018

Abstract

A CrCoNi medium entropy alloy thin film is fabricated using magnetron sputtering. It exhibits a unique hierarchical nanostructure, featuring (1) a high density of planar defects (mostly stacking faults plus a small number of twin boundaries), (2) a dual-phase configuration (a mix of face-centred-cubic and hexagonal-close-packed), and (3) vertically aligned, textured nanocolumns, each with a width of ∼100 nm. The hierarchical nanostructure in this study is original, especially for its dual phase combination, since the bulk CrCoNi medium entropy alloy generally presents a single phase face-centred-cubic structure. The CrCoNi film shows a hardness quadruple that of its face-centred-cubic structured counterpart. The formation and its role of the hierarchical nanostructure in producing such mechanical strength are discussed.

Citation Format(s)

Hierarchical nanostructure of CrCoNi film underlying its remarkable mechanical strength. / Chen, Yujie; Zhou, Zhifeng; Munroe, Paul; Xie, Zonghan.

In: Applied Physics Letters, Vol. 113, No. 8, 081905, 20.08.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review