Effect of Sliding Speed on Wear Behaviors of Soda Lime Glass in Dry Air

The effects of sliding speed and normal load on wear behaviors of soda lime glass in dry air were investigated by rubbing against a pyrex glass ball upon an environment-controlled ball-on-flat tribometer. The results show that, with the increase in sliding speed from 0.25 mm/s to 8 mm/s, the stable friction coefficient of soda lime glass decreased a little bit when the normal load was 2 N, but the effect of speed on the stable friction coefficient became insignificant when the normal load decreased to 1 N. Moreover, the wear volume of soda lime glass increased by 21.5 times when the normal load was 1 N, and it increased by 12.5 times as the normal load increased to 2 N. The analysis showed that, at low speed conditions, the locally temperature rise at the interface of soda lime glass was small, the abrasive wear and adhesive wear, accompanied by a small amount of brittle flaking dominated the wear process. As the speed increased, the wear debris gradually shifted to the pyrex glass ball surface and participated in the wear process. The wear pattern of the soda lime glass also changed to adhesive wear and plowing removal. Compared to high load conditions, the effect of sliding speed on the material removal of soda lime glass was more significant under low load conditions, which was due to the higher growth rate of interfacial temperature rise under low load conditions as the speed increased.