Mechanical properties of very thin cover slip glass disk

Abstract

The biaxial flexural strength, Young's modulus, Vicker's microhardness and fracture toughness data for very thin, commercial, soda-lime-silica cover slip glass (diameter, D-18 mm, thickness, T-0·3 mm; T/D ≈ 0·02) are reported here. The ball on ring biaxial flexure tests were conducted at room temperature as a function of the support ring diameter (≈ 10-20 mm) and cross head speed (0·1-10 mm min-1). In addition, the Weibull modulus data were also determined. The Young's modulus data was measured using a linear variable differential transformer (LVDT) from biaxial flexure tests and was checked out to be comparable to the data obtained independently from the ultrasonic time of flight measurement using a 15 MHz transducer. The microhardness data was obtained for the applied load range of 0·1-20 N. The fracture toughness (KIC) data was obtained by the indentation technique at an applied load of 20 N.