On the exothermic peak during annealing of electrodeposited nanocrystalline nickel

Prasad, MJNV and Chokshi, AH (2011) On the exothermic peak during annealing of electrodeposited nanocrystalline nickel. In: Scripta Materialia, 64 (6). pp. 544-547.

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Abstract

Nanocrystalline metals frequently exhibit poor thermal stability, and the exothermic peak in differential scanning calorimetry is usually attributed to grain growth. We show from experiments on electrodeposited nano-Ni with varying levels of S, and tests with microcrystalline Ni and S powders, that the exothermic peak is associated with the formation of a nickel sulfide phase and concurrent grain growth. Analysis suggests that segregation plays a more important role in limiting grain growth than second-phase particles in nano-Ni. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Scripta Materialia
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Nanocrystalline nickel; Grain growth; Second phase; Segregation
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	18 Mar 2011 10:35
Last Modified:	18 Mar 2011 10:35
URI:	http://eprints.iisc.ac.in/id/eprint/35975

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