Aging and sub- Tg relaxation in arsenic selenide glass fibers

The strengths of arsenic selenide glass fibers have a complex time dependence. A large degradation in strength occurs after fiberization at the beginning of aging: approximately 30 to 40% of freshly drawn strength can be lost during the first several days of aging. The same pattern of strength degra...

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Bibliographic Details
Published in:Materials chemistry and physics 1993, Vol.35 (2), p.160-167
Main Authors: Shieh, S.H.M., LaCourse, W.C.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Exact sciences and technology
Materials science
Physics
Treatment of materials and its effects on microstructure and properties
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Summary:The strengths of arsenic selenide glass fibers have a complex time dependence. A large degradation in strength occurs after fiberization at the beginning of aging: approximately 30 to 40% of freshly drawn strength can be lost during the first several days of aging. The same pattern of strength degradation during aging was observed in fibers that were stored under vacuum, which suggests that the strength degradation process is mainly a physical process of relaxation unrelated to the storing atmosphere. Sub- T g stress and structural relaxations can take place in arsenic selenide glass fibers at temperatures substantially below T g . The characterization of the relaxation function for these materials requires more than a single exponential function.
ISSN:0254-0584
1879-3312
DOI:10.1016/0254-0584(93)90193-P