Correlation between thermal and mechanical relaxation in chalcogenide glass fibers

Pierre Lucas, Ellyn A. King, Yann Gueguen, Jean Christophe Sangleboeuf, Vincent Keryvin, Robert G. Erdmann, Gaelle Delaizir, Catherine Boussard-Pledel, Bruno Bureau, Xiang Hua Zhang, Tanguy Rouxel

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1986-1992
Number of pages7
JournalJournal of the American Ceramic Society
Issue number9
StatePublished - Sep 2009

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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