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Mechanical properties of glasses and TiO2 nanocrystal glass composites in BaO-TiO2-B2O3 system

Paramesh, Gadige and Varma, KBR (2013) Mechanical properties of glasses and TiO2 nanocrystal glass composites in BaO-TiO2-B2O3 system. In: JOURNAL OF NON-CRYSTALLINE SOLIDS, 380 . pp. 128-134.

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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2013.09.010


Glasses and glass-nanocrystal (anatase TiO2) composites in BaO-TiO2-B2O3 system were fabricated by conventional melt-quenching technique and controlled heat treatment respectively. Poisson's ratio and Young's moduli were predicted through Makishima-Mackenzie theoretical equation for the as-quenched glasses by taking the four and three coordinated borons into account. Mechanical properties of the glasses and glass-nanocrystal composites were investigated in detail through nanoindentation and microindentation studies. Predicted Young's moduli of glasses were found to be in reasonable agreement with nanoindentation Measurements. Hardness and Young's modulus were enhanced with increasing volume fraction of nanocrystallites of TiO2 in glass matrix whereas fracture toughness was found susceptible to the surface features. The results were correlated to the structural units and nanocrystals present in the glasses. (C) 2013 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the ELSEVIER SCIENCE BV, NETHERLANDS
Keywords: Borate glasses; TiO2; Nanocrystals; Mechanical properties; Nanoindentation
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 24 Feb 2014 07:52
Last Modified: 24 Feb 2014 07:52
URI: http://eprints.iisc.ac.in/id/eprint/48436

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