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Chemical Kinetics Applied to the Fatigue of Silica Fibers in Sodium Hydroxide Solutions

Published online by Cambridge University Press:  15 February 2011

Daryl Inniss ,
Darryl L. Brownlow ,
Charles R. Kurkjian  and
Lourdes R. Borges
Daryl Inniss
Affiliation:
AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
Darryl L. Brownlow
Affiliation:
AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
Charles R. Kurkjian
Affiliation:
AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
Lourdes R. Borges
Affiliation:
Summer Student, Carleton College, Northfield, MN 55057
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Abstract

Chemical kinetics is applied to the fatigue (stress assisted corrosion) of silica fibers in NaOH solutions. The thermodynamic parameters are determined and compared to measurements in water; the zero stress activation energy is the same for the two systems (∼25kcal/mol), but the activation volume in aqueous NaOH solutions is smaller (∼11cm3/mol) than that in water (∼27cm3/mol). The accelerated fatigue rate is dominated by a three decade decrease in the pre-exponential factor; it is shown that this decrease can be attributed to an increase in the entropy of the system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 244: Symposium J – Optical Waveguide Materials , 1991 , 91
Copyright
Copyright © Materials Research Society 1992

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References

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