Wear scar characteristics of thermal power plant waste reinforced nickel matrix composite coatings.

• Main Authors: Othman, Intan Sharhida, Munawar, Rose Farahiyan, Jun, Liew Pay, Abd. Razak, Jeefferie, Suandi, Syahrul Azwan Sundi, Mohamad Zin, Mohd. Rody, Kamis, Shahira Liza, Ahsan, Qumrul
• Format: Article
• Language: English
• Published: Semarak Ilmu Publishing 2023
• Subjects: T Technology (General); TJ Mechanical engineering and machinery
• Online Access: http://eprints.utm.my/106052/1/ShahiraLizaKamis2023_WearScarCharacteristicsofThermalPowerPlan_compressed.pdf; http://eprints.utm.my/106052/; http://dx.doi.org/10.37934/aram.112.1.2131

This research delves into the distinct wear scar properties exhibited by pure nickel and nickel composite coatings with varying concentrations of fly ash when sliding against a stainless steel ball on an aluminium alloy 6061 (AA6061) substrate. The composite coatings were formulated from a modified nickel Watt's bath using an electrodeposition technique, involving a 1-hour process at 40°C and a current density of 5 A/dm². Through experimentation utilizing a high-frequency reciprocating rig (HFRR) tester, the resulting composite coatings underwent assessment, capturing the features of the scar surfaces. Notably, the Ni-FA (nickel-fly ash) composite coating, comprising 90 g/l of fly ash, demonstrated notably enhanced wear resistance in contrast to both the pure nickel coating and the Ni-FA composite coatings with lower fly ash concentrations. The disparities in morphology between the pure nickel and Ni-FA composite coatings were discernible through scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), and analysis of surface roughness on the wear scars. These distinctions can be attributed to the varying impacts of fly ash concentration on the wear scar characteristics.