Indentation creep of Ge-Se chalcogenide glasses below T-g: elastic recovery and non-Newtonian flow - Archive ouverte HAL Access content directly
Journal Articles Journal of Non-Crystalline Solids Year : 2002

Indentation creep of Ge-Se chalcogenide glasses below T-g: elastic recovery and non-Newtonian flow

Abstract

Chalcogenide glasses from the Ge-Se system behave viscoelastically at room temperature. It follows that indentation measurements are time- or rate-dependent. The study of the dependence of hardness (H) on the loading duration for GexSe1-x, glasses with x between 0 and 0.4 shows that the penetration displacement is the sum of an elastic component which reaches values as high as 60% of the total displacement, and a creep one, which is strongly non-Newtonian (shear thinning), and leads to a significant decrease of H with an increase of the loading time. The apparent viscosity and activation energy for flow were derived from the H(t) data on the basis of a theoretical analysis of the indentation process, and the results are in good agreement with those obtained from conventional viscosity measurements. (C) 2002 Elsevier Science B.V. All rights reserved.

Dates and versions

hal-01148142 , version 1 (04-05-2015)

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Jean-Pierre Guin, Tanguy Rouxel, V. Keryvin, Jean-Christophe Sangleboeuf, I. Serre, et al.. Indentation creep of Ge-Se chalcogenide glasses below T-g: elastic recovery and non-Newtonian flow. Journal of Non-Crystalline Solids, 2002, 298 (2-3), pp.PII S0022-3093(01)01053-5. ⟨10.1016/S0022-3093(01)01053-5⟩. ⟨hal-01148142⟩
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