Mechanical properties and tribological characteristics of graphite/Cr3C2 reinforced nickel-based composites
Graphite/Cr3C2 co-reinforced nickel-based composites with different Cr3C2 contents were prepared using hot pressing sintering technology,and microstructure,mechanical properties and friction properties of the composites with different Cr3C2 contents were investigated.The results show that the nickel-based composites prepared by hot pressing sintering is dense and pore free,with Cr3C2 and graphite evenly distributed inside the matrix,and good heterojunction interface bonding.With the increase of Cr3C2 content,the degree of cutting of the composites increases,the hardness increases,but the strength decreases,and the fracture mechanism is brittle fracture.During the friction,the graphite has a good lubricating effect,but the Cr3C2 causes abrasive wear,and with the increase of Cr3C2 content,the friction coefficient and wear rate of the composites significantly increase.
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