Mixing the immiscible through high-velocity mechanical impacts: an experimental and theoretical study

Malviya, Kirtiman D and Oliveira, Eliezer F and Autreto, Pedro A S and Ajayan, Pulickel M and Galvao, Douglas S and Tiwary, Chandra S and Chattopadhyay, Kamanio (2019) Mixing the immiscible through high-velocity mechanical impacts: an experimental and theoretical study. In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 52 (44).

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Abstract

In two-component metallic systems, thermodynamic immiscibility leads to phase separation such as in two-phase eutectic compositional alloys. The limit of the immiscibility of component elements under non-equilibrium conditions have been explored, but achieving complete miscibility and formation of single phase microstructures in eutectic alloys would be unprecedented. Here, we report that during the low-temperature ball milling that provides high energy impact, complete mixing of phases can occur in immiscible Ag-Cu eutectic alloys. From combined theoretical and experimental studies, we show that impact can produce solid solutions of Ag-Cu nanoparticles of eutectic composition. Our results show that phase diagrams of low dimensional materials under non-equilibrium conditions remain unexplored and could lead to new alloy microstructures drastically different from their bulk counterparts.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICS D-APPLIED PHYSICS
Publisher:	IOP PUBLISHING LTD
Additional Information:	copyright for this article belongs to IOP PUBLISHING LTD
Keywords:	high impact; alloy nanoparticle; Ag-Cu solid solution; TEM; STEM-HAADF; EFTEM; molecular dynamics simulation
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	18 Sep 2019 12:06
Last Modified:	18 Sep 2019 12:06
URI:	http://eprints.iisc.ac.in/id/eprint/63545

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