Chemical Properties of Real and Ideal Glass Surfaces
In general, differences in composition and structure may exist between the bulk and ‘real’ surface, or near surface region, of a multicomponent glass. These differences are due to high temperature surface chemical phenomena which occur during the formation and cooling of a melt glass surface, as well as to surface chemical reactions under ambient conditions. This is in contrast to an ‘ideal’ glass surface whose composition and structure are identical to the bulk. It is likely that ideal glass surfaces can be created only by fracturing bulk, homogeneous, microstructure-free glass in an ultra-high environment. These ideal glass surfaces are well-defined and reproducible; therefore, they are excellent precursors for fundamental glass surface studies. They can also be used as calibration standards and control specimens for the interpretation of ‘real’ glass surface analyses. The chemical properties of some ‘real’ and ‘ideal’ glass surfaces will be discussed and related to macroscopic properties including dynamic fatigue and the peel strength of laminated composites.
KeywordsFatigue Migration Dioxide Dust Hydration
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