Enhancing the tribological properties of NiAl based nano-composites for aerospace bearing applications

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Abstract
The present work aims to extend the use of NiAl based nano-composites at different sliding conditions for aerospace bearing systems. A hybrid lubricant of V2O5 nano-wires and graphene nano-platelets (GNPs) has been used. NiAl + 5 wt.% V2O5 nano-wires (NV) and NiAl+5 wt.%+1.5wt.% GNPs (NVG) nano composites have been fabricated and tested. NVG nano-composites showed superior wear resistance at different sliding speeds at RT due to the self -healing properties of GNPs. Furthermore, NVG nano-composites exhibited reasonable wear characteristics at extreme temperatures. NV nano-composites showed better wear resistance at temperatures higher than 600 ˚C in the comparison to NVG nano composites. This behavior was attributed to the formation of an abrasive phase of carbides on the contact surface of NVG nano-composites at elevated temperatures.
Funding Information
  • Science and Technology Plan of Wuhan City ((2013010501010139))
  • Key Project for Science and Technology Plan of Henan province (152102210119)

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