Abstract
The influence of Cr2O3, TiO2 and ZrO2 on the sintering, crystallisation and machinability of SiO2–Al2O3–MgO–K2O–B2O3–F glasses was investigated. Optimum fluoromica glass ceramic compositions with desirable sintering behaviour and machinability were obtained by addition of titanium and chromium oxides to the base glass. Texture and relative intensity of mica phase Imica/ISi were determined by XRD analysis and the particle size distribution of chips was studied by drilling. Microhardness and bending strength were also investigated. The relative intensity of mica phase and microhardness were found to be compatible with the experimental results.
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