RETRACTED: Microstructure and tribological characterizations of Ni-based self-lubricating coating

This article has been retracted from Wear upon the authors' request. It was discovered after publication that due to power supply stability and metering problem, the sintering conditions stated in the paper to produce the materials that were described in the paper could not be replicated in later trials. In view of these uncertainties in procedure, and with the authors' approval, this paper has been retracted and should not be cited in future publications.