Nano Archive

Nano- and micro-indentation studies on lithium borate-barium bismuth niobate glasses

Das, Kaushik and Karthik, C. and Varma, K. B. R. and Ramamurty, U. (2008) Nano- and micro-indentation studies on lithium borate-barium bismuth niobate glasses. Journal of Non-Crystalline Solids, 354 (32). pp. 3793-3798.

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Abstract

The structure and mechanical properties of multifunctional lithium tetra-borate based glasses and glass–ceramics of the system (100 − x) Li2B4O7−x(BaO–Bi2O3–Nb2O5) with x = 10, 20 and 30 in molar ratio, have been characterized. Nano- and micro-indentation techniques were employed to evaluate the elastic modulus, hardness and toughness of the as-cast and annealed glasses. These were complemented with detailed structural investigations using X-ray diffraction, microscopy (optical, scanning electron and high resolution transmission electron microscopies) and nuclear magnetic resonance spectroscopy. These investigations reveal a smooth variation of the mechanical properties with composition except for the composition corresponding to x = 20. This deviation has been attributed to subtle changes in the glass-structure due to amorphous phase-separation and heat-treatment-assisted nano-crystallization.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3934
Deposited By:JNCASR
Deposited On:27 Jan 2009 03:59
Last Modified:18 Apr 2009 11:38

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