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Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2009

Influence of ageing conditions on the mechanical properties of Te-As-Se fibres

Résumé

Mechanical properties of chalcogenide glass fibres from the system Te-As-Se have been investigated as a function of environment (ageing in air, under vacuum and under static stress) through a series of tensile strength measurements. It is shown that the surface quality has a decisive effect on the tensile strength of the fibre. Surface degradation due to air oxidation induces a noticeable decrease in strength. However, a series of mechanical tests performed on fibres preserved in vacuum indicate that structural relaxation of the chalcogenide glass also plays a preponderant role in the loss of mechanical strength. Indeed the trend in mechanical properties correlates well with calorimetric characterizations performed on these glasses. Finally, it is observed that the application of a long-term static stress along the fibre induces a net increase in the tensile strength. These effects are associated with a partial alignment of the chalcogenide chains present in the glass structure. This is consistent with the observation of a longitudinal permanent deformation of these fibres under static stress.

Domaines

Matériaux

Dates et versions

hal-00411548 , version 1 (28-08-2009)

Identifiants

Citer

Gaëlle Delaizir, Jean Christophe Sangleboeuf, Ellyn A. King, Yann Gueguen, Xianghua Zhang, et al.. Influence of ageing conditions on the mechanical properties of Te-As-Se fibres. Journal of Physics D: Applied Physics, 2009, 42 (9), pp.095405. ⟨10.1088/0022-3727/42/9/095405⟩. ⟨hal-00411548⟩
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