Abstract
ABSTRACTObservations are presented of the indentation of amorphous silica films of different thickness on mild steel substrates. The films were prepared by sol—gel dip coating and sintering at 500° C. Indentation of the films with a Berkovich indenter using an ultra micro—indentation hardness system (UMIS) revealed a critical load for the fracture of the thin films. The variation of the fracture load was characterised by a Weibull analysis that gave a mean fracture load and a Weibull modulus. The latter was found to be nearly independent of film thickness whereas the former varied with the square of the thickness.
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