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Meeting Materials Science & Technology 2020
Symposium Glasses, Optical Materials, and their Functional Applications: Current Issues in Science & Technology
Presentation Title Photo-elastic Confirmation of Fast Surface Relaxation of Silica Glasses in the Presence of Water
Author(s) Bronson D. Hausmann, Emily Aaldenberg, Minoru Tomozawa
On-Site Speaker (Planned) Bronson D. Hausmann
Abstract Scope Fast surface stress relaxation has been found to occur in oxide glasses at temperatures far below the glass transition in the presence of water. The observed relaxation has been suggested previously to explain various unresolved phenomena related to the mechanical strength of glass. Until now, residual stress has only been indirectly demonstrated through mechanical analysis or IR peak shift. In the present work, residual stress profiles were calculated using common photo-elastic techniques. Optical retardance profiles were measured in silica glass fibers following heat treatments under bending. Silica glass rods were also analyzed following relaxation under a constant angle of twist. Such retardance profiles were obtained along the width of the glass samples for various stress-treated times and temperatures in air. The stress profiles were found to agree with an error function relaxation profile, supporting the theory of a mechanism controlled by water diffusion.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

2020 Alfred R. Cooper Young Scholar Award Presentation: Beyond the Average: A Statistical Mechanical Exploration of Topological Fluctuations in Glass-Forming Systems
Cooper Distinguished Lecture: Exploring the Amorphous State of Matter by Roaming About the Network Building Blocks
Decoding Structure-Dynamics Correlations in SiO2 Supercooled Liquid by Machine Learning
Development of YAG-alumina Composites for the Lightening Applications
Effect of Nanoscale Phase Separation on the Fracture Behavior of Glasses: Toward Tough, Yet Transparent Glasses
Effect of Transition Metal Impurities on the Properties of ZnSe Single Crystals
Elucidating Defect Behaviors and Lithium Ion Diffusion Mechanisms in Solid State Electrolytes from Atomistic Computer Simulations
Enhanced Optical Nonlinearity in Bismuth Borosilicate Glass Dispersed with Eu2O3 Stabilized Gold Nanoparticles
Glasses beyond Megabar Pressures
Melt-Quenching vs. Sol-gel vs. Vapor Deposition vs. Irradiation: Influence of the Synthesis Method on the Structure of SiO2
Photo-elastic Confirmation of Fast Surface Relaxation of Silica Glasses in the Presence of Water
Relative Roles of O and Si in Crack Nucleation and Propagation Mechanisms in Amorphous Silica
Surface Reactivity of Multi-component Glasses
Terahertz Time-domain Spectroscopy of Glasses

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