Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Pages (from-to) | 197-208 |
Journal / Publication | Journal of Materials Science and Technology |
Volume | 109 |
Online published | 7 Nov 2021 |
Publication status | Published - 20 May 2022 |
Link(s)
DOI | DOI |
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Document Link | Links
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85118942441&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(7113f7bd-7fef-453b-82c8-d4f21ac5d8df).html |
Abstract
In this work, we demonstrate that the corrosion resistance of the FeCrNiCoNb0.5 eutectic high entropy alloy (EHEA) can be tuned by controlling the size of its eutectic structure. Through microstructure refinement, the EHEA exhibits a superb corrosion resistance in 1 M NaCl in terms of a very low corrosion current density and an ultra-high transpassviation potential, which outperforms a variety of other HEAs and conventional metals and alloys. At the fundamental level, the microstructure refinement results in a rapid formation of a thick and compact passive film with less Cl− adsorption on the EHEA, which results in significant enhancement in its corrosion resistance. The outcome of our research provides important insights into the design of corrosion resistant chemically complex alloys.
Research Area(s)
- Eutectic high entropy alloy, Microstructure size, Passivation, Transpassivation potential
Citation Format(s)
Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy. / Shuang, S.; Yu, Q.; Gao, X. et al.
In: Journal of Materials Science and Technology, Vol. 109, 20.05.2022, p. 197-208.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review