Enhanced Particle Incorporation for Co-Electrodeposited Ni-P/Diamond Coatings with a Pulse-Stirring Technique

Kothanam, Nujira; Harachai, Komsak; Hom-on, Chatpawee; Qin, Jiaqian; Boonyongmaneerat, Yuttanant; Triroj, Napat; Jaroenapibal, Papot

doi:10.2139/ssrn.4450314

2023

DOI: 10.2139/ssrn.4450314

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Enhanced Particle Incorporation for Co-Electrodeposited Ni-P/Diamond Coatings with a Pulse-Stirring Technique

Nujira Kothanam

Komsak Harachai

Chatpawee Hom-on³

et al.

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2024

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Effect of Current Density on Hardness of Ni-P/Diamond Composite Coatings Fabricated by Electrodeposition

Kothanam,

Hom-on,

Srimaneerat

et al. 2024

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Nickel-Phosphorous/diamond coatings were electrodeposited onto steel substrates using a pulse-stirring method. The electrodeposition process involved a solution containing nickel sulphate, phosphorus acid, and diamond particles, resulting in the co-electrodeposition of 4-8 µm of diamond particles into a Ni-P matrix. To investigate the effects of electrodeposition current density on the properties of the Ni-P/diamond composite coating, scanning electron microscopy (SEM), hardness testing, and electrochemical testing were employed. The research findings revealed that higher current density (0.03 A/cm2) led to a denser diamond particle coating with diamond contents of up to 32.70 vol%. Additionally, the Ni-P/diamond coatings achieved a maximum hardness of 2819 ± 12.55 HV0.1 when fabricated using the current density of 0.03 A/cm2. The "pulse-stirring fabrication" method yields a coating with significantly enhanced wear resistance due to incorporating densely packed diamond particles. The intermittent pulses during the fabrication process are crucial for achieving the desired dispersion and adhesion of the diamond particles, leading to a practical and durable wear-resistant coating.

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Effect of Current Density on Hardness of Ni-P/Diamond Composite Coatings Fabricated by Electrodeposition

Kothanam,

Hom-on,

Srimaneerat

et al. 2024

SSP

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Influence of Duty Cycle on the Phosphorus Content and Hardness of the Ni-P Coatings Produced by Pulse-Current Electroplating

Wintachai,

Kothanam,

Harachai

et al. 2024

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Ni-P coatings were prepared on low carbon steel substrates using the pulse electrodeposition method. The influence of the pulse duty cycle on the phosphorus content and hardness of the Ni-P coatings was investigated. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed to examine the surface morphology and chemical composition of the Ni-P coating layers. The results showed that an increased pulse duty cycle (20% - 80%) led to a decreased phosphorus content from 17.81 wt.% to 13.71 wt.%. The microhardness values were found to have an inverse relationship with the phosphorus content. The highest hardness of 538.22 ± 12.92 HV0.1 was obtained from the sample produced with a duty cycle of 80%, which had the lowest P content of 13.71 wt.%.

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Enhanced Particle Incorporation for Co-Electrodeposited Ni-P/Diamond Coatings with a Pulse-Stirring Technique

Cited by 2 publications

References 0 publications

Effect of Current Density on Hardness of Ni-P/Diamond Composite Coatings Fabricated by Electrodeposition

Effect of Current Density on Hardness of Ni-P/Diamond Composite Coatings Fabricated by Electrodeposition

Influence of Duty Cycle on the Phosphorus Content and Hardness of the Ni-P Coatings Produced by Pulse-Current Electroplating

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