Influence of Alumina Bubble as Pore Former on the Vitrified Bond Diamond Grinding Wheels

In this study, a vitrified bond diamond wheel was prepared with alumina bubbles as a pore former. The effect of the size and content of the alumina bubble on the flexural strength, porosity, and hardness of the prepared wheels has been studied. The results showed that the porosity of the grinding wheel samples increased with the rise of the content of the alumina bubble. The porosity of the grinding wheel with finer alumina bubbles is higher than that of the coarser one. The hardness and flexural of the samples with finer alumina bubbles are lower than those with the coarser ones. The research result shows that the content and the size of the alumina bubble have a great influence on the flexural strength and hardness of grinding wheel samples.