Synthesis of free standing nanocrystalline Cu by ball milling at cryogenic temperature

Barai, K and Tiwary, CS and Chattopadhyay, PP and Chattopadhyay, K (2012) Synthesis of free standing nanocrystalline Cu by ball milling at cryogenic temperature. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 558 . pp. 52-58.

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Abstract

This paper reports for the first time synthesis of free standing nano-crystalline copper crystals of a similar to 30-40 nm by ball milling of copper powder at 150 K under Argon atmosphere in a specially designed cryomill. The detailed characterization of these particles using multiple techniques that includes transmission electron microscopy confirms our conclusion. Careful analysis of the chemistry of these particles indicates that these particles are essentially contamination free. Through the analysis of existing models of grain size refinements during ball milling and low temperature deformation, we argue that the suppression of thermal processes and low temperature leads to formation of free nanoparticles as the process of fracture dominates over possible cold welding at low temperatures. (C) 2012 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copyright for this article belongs to ELSEVIER SCIENCE SA, SWITZERLAND
Keywords:	Cryomilling;Copper;Nanocrystalline;Nanotwins
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Dec 2012 03:56
Last Modified:	21 Dec 2012 03:56
URI:	http://eprints.iisc.ac.in/id/eprint/45530

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