Wear-Resistant Al/SiC-Gr Hybrid Metal Matrix Composite Fabricated by Multiple Annealing and Roll Bonding

The wear-resistant Al/SiC-Gr hybrid composite with a good combination of strength and ductility is fabricated by multiple annealing and roll bonding. The challenge is that graphite acts as a soft lubricating material and prevents the bonding between the layers. In order to evaluate the bond strength, the peeling test is used after cold roll bonding of Al strips with and without the addition of particles under different conditions. Results show that the bond strength increases with increasing the reduction in thickness, decreasing Gr content and performing the post-rolling annealing. During the multiple annealing and roll bonding process, the tensile strength increases with the cost of a small decrease in elongation. A relatively uniform distribution of particles is achieved at the last stages of the process. The Al/SiC-Gr hybrid composite exhibits an improved wear resistance compared with the monolithic Al and Al/SiC composite produced under the same conditions. The conclusion is drawn that a good combination of wear and mechanical properties can be achieved in the hybrid composite that has less amount of Gr.