Preparation of nanocrystalline high-entropy alloys via cryomilling of cast ingots

Journal article


Kumar, N., Tiwary, C. and Biswas, K. (2018). Preparation of nanocrystalline high-entropy alloys via cryomilling of cast ingots. Journal of Materials Science. 53 (19), pp. 13411-13423. https://doi.org/10.1007/s10853-018-2485-z
AuthorsKumar, N., Tiwary, C. and Biswas, K.
Abstract

The advancement of nanotechnology demands large-scale preparation of nanocrystalline powder of innovative materials. High-entropy alloys (HEAs) exhibit unique properties: mechanical, thermal, magnetic etc., making them potentials candidates for applications in energy, environment and biomaterials etc. Thus, there is a need to develop novel synthesis methods to prepare nanocrystalline high-purity HEAs in large quantity. Conventional mechanical alloying of the multicomponent metallic powder mixture requires larger milling time and it is prone to contaminations and phase transformation. The present investigation reports a unique approach, involving casting followed by cryomilling, leading to formation of nanocrystalline HEAs powder, which are relatively contaminations free with narrow size distribution. Using examples of two FCC and one BCC single-phase HEAs, it has been shown that large-scale nanocrystalline HEAs powder can be prepared after few hours of cryomilling at 123 K. The formation of nanocrystalline HEAs during cryomilling has been discussed using theoretically available approaches.

KeywordsNanocrystalline; HEAs; Cryomilling,; FCC; BCC; TEM
Year2018
JournalJournal of Materials Science
Journal citation53 (19), pp. 13411-13423
PublisherSpringer Science and Business Media LLC
ISSN0022-2461
Digital Object Identifier (DOI)https://doi.org/10.1007/s10853-018-2485-z
Publication dates
PrintOct 2018
Online29 May 2018
Publication process dates
Accepted21 May 2018
Deposited30 Jan 2021
Accepted author manuscript
License
File Access Level
Open
Additional information

This is a post-peer-review, pre-copyedit version of an article published in Journal of Materials Science. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10853-018-2485-z

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https://openresearch.lsbu.ac.uk/item/8vw61

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