Tribological Behavior of NiAl–1.5 wt% Graphene Composite Under Different Velocities

Abstract

The progress in aerospace field requires a new NiAl matrix composite that can stand against wear and decrease the energy dissipation through decreasing friction. In this study, the tribological behavior of NiAl–1.5 wt% graphene composite is investigated at room temperature under a constant load of 12 N and different sliding velocities. The results show that the friction coefficient and wear rate increase with increasing sliding velocity from 0.2 to 0.4 m/s due to the adhesion between the sliding bodies and tearing of the graphene layer. The friction coefficient and wear rate tend to decrease at a sliding velocity of 0.6 m/s as a result of severe plastic deformation and grain refinement of the worn surface. However, at 0.8 m/s the friction coefficient reaches a minimum value and the wear rate increases and changes the wear mechanism to fatigue wear. It can be concluded that various wear mechanisms lead to different tribological performance of NiAl–1.5 wt% graphene composite.

KEY WORDS:

• Solid Lubricants
• Self-Lubrication Friction
• Solid Lubrication Wear
• Self-Lubrication

ACKNOWLEDGEMENT

The authors gratefully thank the Material Research and Testing Center of Wuhan University of Technology for their assistance.

Additional information

Funding

This work was supported by the Nature Science Foundation of Hubei Province (2012FFB05104); the National Natural Science Foundation of China (51275370); the Fundamental Research Funds for the Central Universities (2014-yb-004); the Project for Science and Technology Plan of Wuhan City (2013010501010139); the Academic Leader Program of Wuhan City (201150530146); and the Project for Teaching and Research project of Wuhan University of Technology (2012016).