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Influence of the Mechanical and Chemical Thresholds on the Microhardness of Ternary Chalcogenide Glasses

Chitralekha, J and Srinivasan, A and Chattopadhyay, K and Gopal, ESR (1996) Influence of the Mechanical and Chemical Thresholds on the Microhardness of Ternary Chalcogenide Glasses. In: Physica Status Solidi B, 197 (2). pp. 343-348.

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Abstract

The microhardness of Ge-Sb-Se, Si-As-Te, and Ge-As-Te glasses has been studied as a function of the average coordination number $\langle r \rangle$ . A step-like increase is observed in the Vickers hardness number (VHN) above $\langle r \rangle$ = 2.30 in Ge-Sb-Se glasses, and above $\langle r \rangle$ = 2.50 in Si-As-Te and Ge- As-Te glasses. This behaviour can be interpreted on the basis of the occurrence of a mechanical and chemical threshold in these glassy systems. The applicability of this technique to measure the elasto-plastic properties of small and brittle samples such as tellurium-based chalcogenide glasses is highlighted.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley & Sons.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 24 Jun 2007
Last Modified: 19 Sep 2010 04:37
URI: http://eprints.iisc.ernet.in/id/eprint/10787

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