The high concentration and uniform distribution of diamond particles in Ni-diamond composite coatings by sediment co-deposition

Abstract

Ni‐diamond composite coatings with high concentration and uniform distribution of diamond particles were prepared by using sediment co‐deposition (SCD) technique from Watts‐type electrolyte without any additives. The surface and cross‐section morphology was evaluated by optical microscope (OM) and scanning electron microscopy (SEM). It was demonstrated that the Ni‐monolayer diamond composite coatings ~40 ± 5 µm was successfully prepared by the new developed setup for SCD technique. Using this new developed setup, high concentration and uniform distribution of diamond particles of Ni‐monolayer diamond composite coatings were easily fabricated. The wear resistance and cutting performance of obtained composite coatings were also investigated. The results revealed that anti‐wear and cutting performance is superior to those prepared via conventional co‐electrodeposition (CED) technique and pure Ni coatings. In the SCD process, with the increasing diamond content, the wear resistance is approximately the same, and the cutting performance decreases. Therefore, not only the diamond particle content is responsible for the wear resistance and cutting performance, the distribution of diamond particles is also very important factor. Copyright © 2014 John Wiley & Sons, Ltd.

Co-electrodeposition of hard Ni-W/diamond nanocomposite coatings

“…Therefore, the diamond content in Ni-W/diamond composite coatings prepared using the conventional electrodeposition is low, so that the hardness of diamond particles would make only a minor contribution to the hardness of the obtained coatings. We have previously demonstrated the preparation of composite coatings using SCD method 15 . Figure 1(a) shows the setup of SCD.…”

“…The bath composite and plating conditions are listed in Table 1 . We have previously demonstrated the preparation of composite coatings using SCD method 15 . Figure 1(a) shows the setup of SCD.…”

Ampliação e Aprofundamento de Conhecimentos nas Áreas das Engenharias

“…Temperatures are controlled throughout the process and generally ranged between 40 and 60 °C. (QIN et al, 2014;ZHOU et al, 2015) 6 | HEAT TREATMENT AFTER THE ELECTROPLATING Some authors have been reported improvements in adherence and mechanical properties of coatings through heat treatments after the deposition. Wang et al (2014) studied the heat treatment of Ni-W/nanocrystalline diamond deposited at stainless steel.…”

Thermal conductivity of bulk nanocrystalline nickel-diamond composites produced by electrodeposition

“…Burkat et al have reported that the hardness of electrodeposited nickel increases up to 90% with the addition of 4.3 nm diamond particles in the nickel matrix [3] at a diamond content in the composites of only 0.65 wt.%. In the past, some studies reported on the incorporation of high volume fractions of micron-sized diamond particles in electrodeposited metal matrices [23,25,26]. The thermal conductivity of these metal-diamond composites could potentially be suitable for heat sink applications.…”