Interface Structures in Nanocrystalline Materials

Ranganathan, S and Divakar, R and Raghunathan, VS (2001) Interface Structures in Nanocrystalline Materials. In: Scripta Materialia, 44 (8-9). pp. 1169-1174.

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Abstract

Grain boundary and triple junction structures in nanocrystalline palladium and titanium thin films and in nanocrystalline thorium dioxide powder and sintered pellets have been studied. Amorphous packets with bright contrast are seen in many of the grain boundary junctions and are considered to form as a result of the relaxation of triple junction disclinations. The varying degrees of relaxation of disclinations in NC's lead to a variety of grain boundary structures and are also responsible for the random variation in its lattice parameter in the different nanocrystalline grains. Nanocrystalline state has been suggested to be a desirable microstructural criterion for solid state amorphization. Further it is to be pointed out that no special features which could be attributed to the nature of bonding in the two materials were seen in this study.

Item Type:	Journal Article
Publication:	Scripta Materialia
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Physical vapor deposition;Transmission electron microscopy (TEM), metals;Interface;Nanocrystal
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	13 Aug 2007
Last Modified:	19 Sep 2010 04:36
URI:	http://eprints.iisc.ac.in/id/eprint/10511

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