Chemical vapor deposition diamond (CVD-D) grinding tools are manufactured by coating a polycrystalline diamond film as abrasive. CVD diamond grinding tools layers are widely used for processing hard materials such as ceramics, alloys and composites because of their extreme hardness, high particle density, uniform abrasive distribution, superb dimensional stability and binder-free structure.Gabler et al. used CVD-D grinding tools on glass and ceramics to obtain grinding surfaces with optical quality. Shen et al. synthesized a new CVD single crystal diamond (SCD) and explored its grinding performance in SiC ceramic single crystal grinding. However, with the expanding applications, the limitations of CVD-D grinding tools due to the lack of chip holding space continue to emerge.

It has been suggested that machining an appropriate structured surface on the grinding tool surface is an effective way to increase the chip evacuation space and promote chip evacuation. Tsuchiya et al. designed a grinding tool with a spiral groove on the surface to continuously evacuate chips and eliminate chip loading. Li et al. found that a structured grinding wheel can provide more space for chips. Thus, the structured surface plays an important role in the conditioning of abrasives, and in fact, it is also reflected in the improvement of machining performance, such as grinding forces and grinding heat. Walter et al. fabricated a structured grinding wheel with micro-groove arrays based on an ultrashort pulse laser and found a 25-50% reduction in grinding forces and a significant improvement in the stability of grinding forces. Tawakoli et al. created a grinding wheel with a design structured surface grinding wheels. Compared to conventional grinding wheels, structured wheels not only help to reduce grinding forces, but also facilitate the reduction of thermal damage during dry grinding. In our previous work, microstructured surfaces of several tens of microns in size were used to improve the grinding performance of CVD-D abrasives. Both the grinding force and the subsurface damage of the grinding surface were effectively reduced. There has also been some research around the fabrication of "abrasive particles" on CVD diamond by structuring methods. Butler et al. used pulsed lasers to generate structures on thick-film CVD diamond blocks and investigated their grinding performance on titanium alloys from a crystallographic point of view. Similarly, Qu et al. developed a binder-free grinding tool by ablating a femtosecond laser on a CVD diamond wafer and verified that the rework life of the tool was satisfactory. In summary, microstructured grinding tools have been extensively tried and studied recently from the perspective of improving grinding performance. However, wear characteristics, which are important evaluation indicators of tool performance, have not been investigated so far, whether for microstructured CVD abrasives or other microstructured abrasives, although many scholars have mentioned its necessity in their studies. More importantly, according to the summary of Li et al. on textured grinding wheels, the geometry of microstructures is important because they affect grinding temperature and force, wheel wear, workpiece surface roughness, etc. Therefore, it is of interest to study the influence of microstructure parameters on the wear characteristics of abrasive tools.

For this, the wear characteristics of microstructured CVD-D abrasives with CGDE abrasives and FGDMB abrasives were investigated. First, three different microstructured abrasives were fabricated by laser micromachining. Then, the composition and wear morphology of CVD-D abrasives in different grinding stages were described and analyzed. Finally, the effects of different patterns, widths and structure percentages on the grinding rate and grinding force of the CVD-D grinding tools were investigated.