Influence of TiO2 on the physical properties of low-temperature ceramic vitrified bond and mechanical properties of CBN composites

Abstract The microstructures and properties of vitrified bond abrasive tools made of CBN grains and advanced vitrified bond systems with different TiO 2 doping amounts were investigated. Based on the experimental observations and analysis, the incorporation of TiO 2 in appropriate amount (4 wt.%) was beneficial to the improvement on flowing ability and thermal expansion property of the vitrified bond systems, and mechanical properties of the CBN composites including bending strength and Rockwell hardness were obviously improved. On the basis of discussion for microstructure, the CBN grains were better covered by vitrified bond and acquired less pores when the content of TiO 2 reached 4 wt.%. These results were related to the role of TiO 2 in the glass network structure which was analyzed by Fourier transform infrared spectroscopy (FTIR).