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https://hdl.handle.net/2440/117533
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Type: | Journal article |
Title: | Hierarchical nanostructure of CrCoNi film underlying its remarkable mechanical strength |
Author: | Chen, Y. Zhou, Z. Munroe, P. Xie, Z. |
Citation: | Applied Physics Letters, 2018; 113(8):081905-1-081905-5 |
Publisher: | AIP Publishing |
Issue Date: | 2018 |
ISSN: | 0003-6951 1077-3118 |
Statement of Responsibility: | Yujie Chen, Zhifeng Zhou, Paul Munroe and Zonghan Xie |
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. |
Rights: | © 2018 Author(s). |
DOI: | 10.1063/1.5042148 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1063/1.5042148 |
Appears in Collections: | Aurora harvest 8 Mechanical Engineering publications |
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