Etude comparative de l'érosion par particules de sable d'un verre organique en polystyrène et d'un verre sodocalcique

Abstract

In the Saharan regions of our country, the glasses are exposed to the influence of the sand wind. This influence is caused by a repeated and random attack of sand and dust particles on the surface. This results in a gradual loss of optical transmission due to the increased roughness that generates light scattering centers. The transparency of transparent materials in the visible range gives their surfaces a major role in most applications. However, in many cases, it is precisely the surface that is exposed to external aggressions (chemical, mechanical, atmospheric attacks, ...). The goal of my work is to simulate in the laboratory erosion cassis of organic glasses by the projection of sand particles. This involves exposing glass samples to the effect of sand flow in terms of erosion parameters (sand mass projected sand flow velocity and angle of impact) and subsequently determining the transmission optical, roughness and mass loss. Part of the work will be devoted to the statistical study of surface defects by the Weibull model and the mechanisms of erosions and possibly the variations of mass loss, transmission and erosion rate. A second part is dedicated to the comparative study of the effect of erosion on organic glass (polystyrene) and another mineral (sodocalcic).