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Abstract
The micromechanical and tribological properties of titanium matrix composites reinforced with graphene oxide (GO) were investigated by nanoindentation and nanoscratch methods. The effect of sintering temperature on the nanohardness and elastic modulus of the composite was also evaluated. The results indicate that as the GO content and sintering temperature of the composite were increased, the nanohardness and elastic modulus significantly increased, attributing to the high mechanical property of GO and TiC formation. The composite reinforced with 5 wt% GO exhibited the maximum nanohardness (4.79 GPa) and elastic modulus (163.7 GPa) at 1473 K. At high temperatures, the composite achieved high elastic recovery. The nanoscratch behavior of the composites revealed that increased GO content and sintering temperature led to enhanced elastic recovery and reduced coefficient of friction.
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