Abstract
AbstractIn the present study, mechanical properties of 0.25Li2O.2SiO2-0.75BaO.2SiO2glass-ceramic were investigated. The trans-formations‘ temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (KIC), crack half-length ‚c‘ of the samples was measured. To calculateKIC, Young’s modulus,Eand the measured hardness,Hvwere used. UsingKICand probability of fracture ‚P‘, ln ln[1/(1 −P)] – lnKICgraph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, ‚m‘ and scale parameter, ‚K0‘ were determined and compared with each other.
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