Abstract
The effect of heat treatment and plasma nitriding post-processes on the properties of medium and high boron electroless nickel coatings were investigated. Chemical Composition, microstructure, roughness, microhardness and tribological behavior of the coatings were evaluated. Results indicated that the highest microhardness value was achieved for the plasma nitrided high boron coating being equal 1459 HV0.1. Furthermore, it was found that the provision of denser structure along with formation of lubricant h-BN phase significantly improve the tribological behavior of the plasma nitrided coatings. According to the sliding wear test results, mean wear rate and Coefficient of friction values of the plasma nitrided coatings were more than 14 and 2 times lower than that of the heat treated ones, respectively.
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