This study presents the development of duplex NiP/NiMo-(h)BN co-electrodeposit applied to steel substrates using a reverse pulsed current (PC) deposition technique. The (h)BN was synthesized in a two-dimensional nanosheet structure via metallothermic reduction in molten salt. Duplex electrodeposition provide improved physical and mechanical characteristics over single-layer plating, making them suitable for applications requiring enhanced wear and adhesion properties. Here, NiP was selected as the inner layer due to its strong adhesion to steel, while NiMo-(h)BN served as the outer layer to maximize wear resistance. Both NiP and NiP/NiMo-(h)BN electrodeposits were deposited using a reverse pulsed current approach to enhance high temperature wear resistance of the steel substrate. Incorporating (h)BN nanosheets into the NiMo matrix significantly improved the deposit's nano-hardness, raising it from 4.26 GPa to 5.23 GPa with the addition of 10 g/L (h)BN. Additionally, the solid lubrication properties of (h)BN reduced the friction coefficient of the duplex electrodeposit from 0.7 to 0.4 µ. At 400 °C, the wear rate of the duplex NiP/NiMo-(h)BN co-electrodeposit was measured at 1.77 x 10⁻⁵ mm³/Nm, demonstrating nearly twice the wear resistance compared to the duplex NiP/NiMo alloy deposit.
Electrodeposition Pulse reverse current (h)BN Reinforcement Duplex coating Nanohardness High temperature wear
Sakarya University Science Research Projects Coordinators
SAU BAP 2020-7-24-86
We would like to thank Etimaden A.Ş. for providing us with the sodium tetraborate used in this study.
This study explores the fabrication of duplex NiP/NiMo-(h)BN co-electrodeposits on steel substrates utilizing the reverse pulsed current (RPC) deposition method. Duplex electrodeposition offers superior physical and mechanical properties compared to single-layer plating, rendering it highly suitable for applications demanding enhanced wear resistance and adhesion. Here, NiP was selected as the inner layer due to its strong adhesion to steel, while NiMo-(h)BN served as the outer layer to maximize wear resistance. Both NiP and NiP/NiMo-(h)BN electrodeposits were deposited using a reverse pulsed current approach to enhance high temperature wear resistance of the steel substrate. The incorporation of (h)BN nanosheets into the NiMo matrix markedly enhanced the nano-hardness of the deposit, increasing it from 4.26 GPa to 5.23 GPa with the incorporation of 10 g/L (h)BN. Additionally, the solid lubrication properties of (h)BN reduced the friction coefficient of the duplex electrodeposit from 0.7 to 0.4 µ. At 400 °C, the duplex NiP/NiMo-(h)BN co-electrodeposit exhibited a wear rate of 1.77 × 10⁵ mm³/Nm, nearly doubling the wear resistance of the duplex NiP/NiMo alloy deposit.
Electrodeposition Pulse reverse current (h)BN Reinforcement Duplex coating Nanohardness High temperature wear
SAU BAP 2020-7-24-86
Primary Language | English |
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Subjects | Material Production Technologies |
Journal Section | Research Articles |
Authors | |
Project Number | SAU BAP 2020-7-24-86 |
Early Pub Date | February 13, 2025 |
Publication Date | |
Submission Date | November 1, 2024 |
Acceptance Date | January 29, 2025 |
Published in Issue | Year 2025 Volume: 29 Issue: 1 |