Manoylov, Anton, Bojarevics, Valdis ORCID: https://orcid.org/0000-0002-7326-7748 and Pericleous, Koulis ORCID: https://orcid.org/0000-0002-7426-9999 (2015) Modeling the break-up of nano-particle clusters in aluminum- and magnesium-based metal matrix nano-composites. Metallurgical and Materials Transactions A, 46 (7). pp. 2893-2907. ISSN 1073-5623 (Print), 1543-1940 (Online) (doi:10.1007/s11661-015-2934-0)

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Abstract

Aluminum- and magnesium-based metal matrix nano-composites with ceramic nano-reinforcements promise low weight with high durability and superior strength, desirable properties in aerospace, automobile, and other applications. However, nano-particle agglomerations lead to adverse effects on final properties: large-size clusters no longer act as dislocation anchors, but instead become defects; the resulting particle distribution will be uneven, leading to inconsistent properties. To prevent agglomeration and to break-up clusters, ultrasonic processing is used via an immersed sonotrode, or alternatively via electromagnetic vibration. A study of the interaction forces holding the nano-particles together shows that the choice of adhesion model significantly affects estimates of break-up force and that simple Stokes drag due to stirring is insufficient to break-up the clusters. The complex interaction of flow and co-joint particles under a high frequency external field (ultrasonic, electromagnetic) is addressed in detail using a discrete-element method code to demonstrate the effect of these fields on de-agglomeration.

Item Type:	Article
Additional Information:	The Author's Accepted Manuscript version has been uploaded in accordance with the publisher's self-archiving policy. This is the Author’s Accepted Manuscript version of a paper published in METALLURGICAL AND MATERIALS TRANSACTIONS A by Springer US on 12 May 2015. The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-015-2934-0.
Uncontrolled Keywords:	Modeling; Break-up of nano-particle clusters; Aluminum, Magnesium; Nano-composites
Subjects:	Q Science > QA Mathematics Q Science > QD Chemistry
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG) Faculty of Engineering & Science > School of Computing & Mathematical Sciences (CMS) Faculty of Engineering & Science
Last Modified:	04 Mar 2022 13:07
URI:	http://gala.gre.ac.uk/id/eprint/13651

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