Effects of Graphene and carbon nanotubes on the microstructure and grinding performance of brazed diamond grinding wheels

To address the challenges such as excessive grinding forces, poor surface quality, and severe wheel wear during grinding of zirconia ceramic with traditional brazed diamond grinding wheels, the diamond grinding wheels were fabricated using Ni-Cr alloy modified with carbon nanotubes (CNTs) and graphene (Gr) respectively in this study. Comparative grinding experiments on zirconia ceramics were performed. The results showed that the carbon modified composite filler had an inhibition effect on the thermal damage to diamond. Compared with traditional Ni-Cr alloy brazed diamond wheel, the grinding force of CNTs modified Ni-Cr alloy brazed diamond wheel and Gr modified Ni-Cr alloy brazed diamond wheel in grinding zirconia ceramics decreased by 45% and 41% respectively, and the surface roughness decreased by 29.5% and 40.6% respectively. The Gr modified Ni-Cr alloy brazed diamond grinding wheel showed the best wear performance than the other two grinding wheels.