Abstract
This study used a backward propagation (BP) model to estimate the microhardness of Ni-TiN nanoplatings prepared using pulse electrodeposition. The influence of electroplating parameters on the microhardness of Ni-TiN nanoplatings was discussed. These parameters included the concentration of the TiN particle, pulse frequency, duty cycle, and current density. The surface morphology, microstructure, and microhardness of Ni-TiN nanoplatings were examined using white-light interfering profilometry, scanning electron microscopy, Rockwell hardness testing, and high-resolution transmission emission microscopy. The Ni-TiN thin film prepared by pulse electrodeposition had a surface roughness of about 0.122 µm, and the average size of the Ni and TiN grains on this film was 61.8 and 31.3 nm, respectively. The optimal process parameters were determined based on the maximum microhardness of the deposited Ni-TiN nanoplatings, which included an 8 g/L TiN particle concentration, a 5 A/dm2 current density, an 80 Hz pulse frequency, and a 0.7 duty cycle. It could be concluded that the BP model would accurately forecast the microhardness of Ni-TiN nanoplatings, with a maximal error of about 1.04%.
Highlights
As a general procedure, pulse electrodeposition is frequently employed to deposit different metal-ceramic or metal platings on base materials [1,2,3,4]
The results revealed that Ni-SiC nanoplatings prepared via ultrasonic pulsed current (UPC) electrodeposition had a very compact and uniform surface morphology, with an average diameter of Ni and SiC grains in the Ni-SiC nanoplatings of 63.6 and 38.5 nm, respectively
The findings revealed that the current density had a substantial impact on the microhardness of the deposited platings
Summary
Pulse electrodeposition is frequently employed to deposit different metal-ceramic or metal platings on base materials [1,2,3,4]. Pulse electrodeposition is a reliable, simple, and efficient process of preparing Ni-TiN nanoplatings. During the pulse electrodeposition process, special care should be paid to the shape and properties of the produced parts, which are affected by the features of the coating deposited on the surface [9]. Different processing factors, such as current density, duty cycle, the concentration of particle, bath temperature, rate of stirring, and pH value, all had a direct effect on the properties of the prepared nanoplatings, including strength, wear, hardness, and corrosion resistance [10].
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