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Article Dans Une Revue Journal of the American Ceramic Society Année : 2009

Correlation Between Thermal and Mechanical Relaxation in Chalcogenide Glass Fibers

Bruno Bureau
Xianghua Zhang

Résumé

Enthalpy relaxation processes in chalcogenide fibers at room temperature are investigated by differential scanning calorimetry and compared with bending-stress relaxation measurements obtained by rolling fibers on a mandrel and recording the viscoelastic relaxation parameters. While the kinetics of the two processes is very different, several qualitative correlations are demonstrated between the enthalpy state and the mechanical properties of chalcogenide glass fibers. It is observed that the ability to undergo stress relaxation is dependent upon the fictive temperature of the glass. Stress relaxation in a glass far from thermodynamic equilibrium is contingent upon its ability to undergo enthalpy relaxation and is minimal in glasses that have already relaxed enthalpy or in which relaxation time is overwhelmingly large.

Domaines

Matériaux

Dates et versions

hal-00496889 , version 1 (01-07-2010)

Identifiants

Citer

Pierre Lucas, Ellyn A. King, Yann Gueguen, Jean-Christophe Sangleboeuf, Vincent Keryvin, et al.. Correlation Between Thermal and Mechanical Relaxation in Chalcogenide Glass Fibers. Journal of the American Ceramic Society, 2009, 92 (9), pp.1986-1992. ⟨10.1111/j.1551-2916.2009.03150.x⟩. ⟨hal-00496889⟩
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