ABSTRACT The traditional thermal curing method for preparing resin‐bonded diamond grinding wheels is constrained by mechanical properties and requires considerable energy and time. To address these issues, resin‐bonded nickel‐plated diamond grinding wheel samples reinforced by recycled short‐cut carbon fibers were successfully prepared in a microwave field. Dielectric property analysis indicates that the recycled short‐cut carbon fibers (CFs) are primary microwave absorbers. Compared to the resin‐bonded pristine diamond composite samples, the flexural strength and hardness of the resin‐bonded nickel‐plated diamond composites can be enhanced by 42.97% and 68.62%, respectively. Microwave curing technology enhances the flexural strength and hardness of resin‐bonded nickel‐plated diamond composites by 221% and 211.71%, respectively. Fourier transform infrared (FTIR) and solid‐state nuclear magnetic resonance (NMR) analyses indicate that microwave irradiation facilitates the condensation reaction among hydroxymethyl groups. Scanning electron microscope (SEM) observations show improved interfacial bonding between the resin matrix and nickel‐plated diamond in microwave‐cured samples. This study highlights a valuable application of recycled carbon fibers, and the synergistic reinforcement of microwave heating and recycled CFs is beneficial to improving the mechanical performance of resin‐bonded diamond composites.
Shu et al. (Thu,) studied this question.