Effect of electrodeposition current density and quarry dust content on the characteristics and tribological properties of ni-recycled quarry dust composite coatings

• Main Author: Mohammad Baba, Anis Anizah
• Format: Thesis
• Language: English; English
• Published: 2022
• Subjects: T Technology (General); TS Manufactures
• Online Access: http://eprints.utem.edu.my/id/eprint/26694/; https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=121994

The study experimentally investigated the effect of various current density and quarry dust content on the surface properties and tribological properties of electrodeposited nickel quarry dust composite coatings on High Speed Steel (HSS) substrate. HSS is widely used as a high speed cutting tool due to their excellent red hardness and good wear resistance. Quarry dust is used in this study as a reinforcement because of its high silica and alumina content, which helps to improve the coating's properties. In order to get finer size of quarry dust particles, quarry dust has undergo ball milling process before electrodeposition process. Various current density with range from 2 A/dm2 to 8 A/dm2 and various quarry dust content with range between 15 g/L to 60 g/L were used in this study as the different range of current density and quarry dust content have different outcome. The composite coatings was characterized using Scanning Electron Microscope (SEM) and X- Ray Diffraction (XRD). The influence of current density and quarry dust content was investigated using hardness test and wear test. As the current density and quarry dust content increases, the hardness of the substrate will increases too. The highest hardness value is obtained when current density is at 6 A/dm2 and quarry dust content is 45 g//L. It is same as for the result of wear test as the wear track length is smaller and the wear occur on the surface. With an increase in current density and quarry dust content, the COF value decreased. Therefore, the optimum experiment's parameters are current density at 6 A/dm2 and a quarry dust content at 45g/L.