Effect of quarry dust composition on the properties of nickel-quarry dust composite coatings

• Auteur principal: Azhar, Emmy Nurulazwana
• Format: Thèse
• Langue: anglais; anglais
• Publié: 2018
• Sujets: T Technology (General); TA Engineering (General). Civil engineering (General)
• Accès en ligne: http://eprints.utem.edu.my/id/eprint/23976/1/Effect%20Of%20Quarry%20Dust%20Composition%20On%20The%20Properties%20Of%20Nickel-Quarry%20Dust%20Composite%20Coatings.pdf; http://eprints.utem.edu.my/id/eprint/23976/2/Effect%20Of%20Quarry%20Dust%20Composition%20On%20The%20Properties%20Of%20Nickel-Quarry%20Dust%20Composite%20Coatings.pdf

The rational of this research is to study the effect of quarry dust composition on the properties of nickel-quarry dust (Ni-QD) composite coating on aluminium alloy 6061 (AA6061) substrate. AA6061 is widely used in aircraft industries due to its low density to weight ratio and high strength. As aluminum operates in aggressive environments in atmospheric air, the aluminium must be coated to prevent corrosion. However, aluminum and its alloys have a high affinity to oxygen which means it always be covered with a thin oxide film growing rapidly. Thus, surface pre-treatment should be done before proceed to electrodeposition. The composition of quarry dust in nickel Watt’s bath is varied from 10g/l to 50g/l. The characterization of quarry dust particles and Ni-QD composite coating on AA6061 substrate was characterized using X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF) and Scanning Electron Microscopy (SEM). Ni-QD composite coating also being tested to investigate the wear and hardness properties. From the results, the hardness of Ni-QD composite coating increased by increasing the quarry dust composition. Other than that, Ni-QD composite coatings also showed a good result in wear testing where the average of COF of Ni-QD composite coatings is lower than bare AA6061.