A review of models for single particle compression and their application to silica microspheres

摘要: Abstract We report on the deformation behavior of single silica microspheres. For first time a detailed discussion quantitative evaluation force–deformation data in elastic and plastic regime is given. The microspheres are compressed between two flat plates custom built manipulation device supported by scanning electron microscope. allows high sample throughput enabling full statistical Existing theories describing spheres discussed applied to results obtained from compared each other values reported literature. exhibit significantly different than expected bulk fused silica, i.e. distinct behavior. Furthermore, significant decrease Young’s modulus hardness was observed caused porosity reduced crosslinking silicon atoms, respectively, that inherent produced Stober synthesis. However, calculated contact pressures exceed compressive strength at least factor as an effect amount material flaws microstructures.