Silica Glass Fibers : Modes Of Degradation And Thoughts On Protection

Albert A. Kruger; William M. Mularie

doi:10.1117/12.935621

29 March 1984 Silica Glass Fibers : Modes Of Degradation And Thoughts On Protection

Albert A. Kruger, William M. Mularie

Proceedings Volume 0404, Optical Fibers in Adverse Environments; (1984) https://doi.org/10.1117/12.935621
Event: Photon 83 International Conference on Optical Fibers, 1983, Paris, France

Abstract

The widely held explanation for mechanical failure of silicate glasses rests upon the existence of Griffith-flaw and the associated free-ion diffusion concept used to model crack growth. However, this theory has consistently failed to provide complete agreement with the experimental results known to those "schooled" in the poignant literature. This dilemma coupled with the reports of single-valued strengths in fibers cannot be rationalized by the modification of the intrinsic Griffith-flaw distribution to essentially a delta function (this violates entropy). It is for these reasons that the field-enhanced ion diffusion model has been introduced. The inclusion of a term for electrostatic potential in the solution of Fick's second law is shown to be consistent with the experimental results in the existing literature. The results of the work presented herein provide further support of the proposed model, and the implied consequences of chemical corrosion in glass which results in its subsequent failure.

Citation Download Citation

Albert A. Kruger and William M. Mularie "Silica Glass Fibers : Modes Of Degradation And Thoughts On Protection", Proc. SPIE 0404, Optical Fibers in Adverse Environments, (29 March 1984); https://doi.org/10.1117/12.935621

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