Mechanical characterization of micro- and nano-porous alumina

摘要: Abstract Advanced membrane concepts are based on thin layers that require a mechanically robust porous substrate material. Aiming at the use in pre-combustion systems, alumina with different pore sizes were characterized respect to their mechanical properties. Elastic moduli and fracture stresses assessed using ring-on-ring bending tests. Furthermore, elastic compared data obtained from indentation Although porosity of micro- nano-porous materials equal, stress values revealed significant differences, indicating considerations material is far superior, although initial permeation test indicate difficulties it as substrate. showed good agreement model load-bearing contact area. Microstructural investigations supported higher strength result larger area between grains.