Tribological study of strontium bismuth titanate borosilicate glass ceramics

Abstract

Glass ceramic samples of five different compositions were prepared in the systems 60[(Sr1-xBix).TiO3] - 39[2SiO2.B2O3] - 1[CeO2] (x = 0.0, 0.1, 0.2 and 0.4 mole %) and 60[(Sr1-xBix)TiO3]-40[2SiO2.B2O3] for x=0.1 mole% by employing conventional melt quench technique. This paper presents the tribological study, viz. specific wear rate and coefficient of friction, of the synthesized borosilicate glass ceramics at different applied normal loads under dry conditions using a pin-on-disc tribometer. It has been observed that the strontium bismuth titanate borosilicate glass ceramic sample with higher bismuth content shows reduced wear rate compared to other samples. Also, the coefficient of friction decreases with an increase in bismuth content. This may be due to good binding nature of bismuth at the microstructure level. The morphology and the wear mechanism of the worn out surfaces of different glass ceramic samples were also studied using scanning electron microscope (SEM).