Rigidity Transition in Chalcogenide Glasses: Dynamic Nano-Indentation and Diffuse Reflectance Spectroscopic Studies

Chaturvedi, A and Varma, GS and Sundararajan, A and Ramamurty, U (2022) Rigidity Transition in Chalcogenide Glasses: Dynamic Nano-Indentation and Diffuse Reflectance Spectroscopic Studies. In: 2022 IEEE International Conference on Emerging Electronics, 11-14 Dec 2022.

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Abstract

Rigidity Transitions in quaternary glasses were investigated using dynamic nanoindentation and DRS reflectance spectroscopy in Ge 15Te 80-xIn 5Ag x glasses. In quasi-static properties such as reduced modulus, E r and hardness, H, an extended rigidity transition with distinct floppy, intermediate and rigid phase is observed, while indentation toughness, K c and brittleness index, BI exhibits a rigidity transition at x =12. Floppy modes exhibit higher K c values when compared to rigid modes. Dynamic visco-elastic property, storage modulus vs frequency, f exhibits a trend reversal for floppy and rigid phases, which is attributed to difference in heat losses. The manifestation of intermediate phase (IP) in optical band gap E g) is observed in the composition range (8 ≤ x ≤ 14) at. %.

Item Type:	Conference Paper
Publication:	2022 IEEE International Conference on Emerging Electronics, ICEE 2022
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the IEEE.
Keywords:	Chalcogenide glasses; Intermediate phase; optical band gap; quasi static properties; Rigidity percolation; viscoelastic properties
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	27 Jun 2023 07:31
Last Modified:	27 Jun 2023 07:31
URI:	https://eprints.iisc.ac.in/id/eprint/82161

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