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Fargin Evelyne

Fargin Evelyne

ICMCB - Universite Bordeaux, France

Title: Surface engineering of soda lime silicate glass under thermal poling process for hardness reinforcement

Biography

Biography: Fargin Evelyne

Abstract

Surface engineering of soda-lime silicate glass has been performed by thermal poling and the correlation between the modification of the glass composition, the local structure and the mechanical properties of the field-induced modified surface has been investigated. Glow discharge optical emission spectroscopy (GD-OES) demonstrates the multi-layered structuring of the glass surface, due to the migration of mobile cations species. The nature of the atmosphere during poling directly impacts on the charge compensation mechanisms, the multi-layer shape and composition. This work demonstrates the presence of a pure layer of silica beneath the surface of the poled glass under N2 which strongly increases the mechanical properties of soda-lime glass, especially hardness. The thermal poling treatment is then used to enhance a densification of the poled region and a compressive stress at the silica nanometric layer surface.

Berkovitch nano-indentation results on unpoled reference versus poled soda-lime glass under N2

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