Experimental strength characterisation of thin chemically pre-stressed glass based on laser-induced flaws

The strength of chemically pre-stressed glass depends on the depth surface flaws and value pre-stress. So far, some research has been conducted this topic; however, there were always uncertainties regarding flaw pre-stress profile. Consequently, characterises profile using experimental methods. latter include measuring layer (DoL) compressive (CS) with FSM-7000 h verifying achieved DoL Na+ K+ distribution through thickness obtained from SEM/EDS analysis. Results demonstrate that amount K decreases parabolically (second-order) to a certain then remains constant. Based observation boundary conditions, equation was for thin aluminosilicate (Falcon®) 8 24 processing durations in molten salt at 460 °C. A non-strengthened (NSG) also used as reference comparison. Then, three artificial laser-induced accurately controlled depths is tested by means clamp bender. results tests demonstrated very low deviations failure stress. It shown even when higher than DoL, which tip enters zone pre-tensile stress, still considerable resistance surrounding intact area. Furthermore, it confirmed strain energy larger h, leading more fragmentation after under similar loading condition. Finally, found fracture toughness not constant thickness, dependent peak surface.