Cutting performance and tool wear in laser-assisted grinding of SiC_f/SiC ceramic matrix composites

Abstract Ceramic matrix composites have high hardness, so their machining requires grinding forces that cause severe wear of the head. To investigate this problem, present study investigated cutting performance conventional (CG) and laser-assisted (LAG) SiC f /SiC ceramic using electroplated diamond heads. Firstly, a three-dimensional transient heat transfer model based on Gaussian source was developed to observe surface internal temperature field distributions subjected laser irradiation. Secondly, effects heating workpiece were analysed. It found axial feed more than 40% lower under LAG CG due removal mechanism changing from brittle fracture ductile oxidation reactions occurred in composites. Thirdly, material analysed by observing morphology machined surfaces, which showed occurs during LAG. Finally, it is also founded mean height exposed abrasive grains reduced 1.02 μ m, 12.52 m respectively. The forms caused studied. Under CG, mainly exhibit cleavage fractures; while LAG, micro-abrasion main form.