Engineering and Technology Journal 40 (12) (2022) 1744 - 1756 Engineering and Technology Journal Journal homepage: https://etj.uotechnology.edu.iq 1744 http://doi.org/10.30684/etj.2022.135387.1270 Received 22 August 2022; Accepted 10 September 2022; Available online 07 October 2022 2412-0758/University of Technology-Iraq, Baghdad, Iraq This is an open access article under the CC BY 4.0 license http://creativecommons.org/licenses/by/4.0 An Investigation on The Effect of Carbon Nanoparticles on The Properties of Carbon Brushes Ahmed A.Alasadi a* , M. I. Mohammad b , Suleyman Basturk c a Mechanical Engineering Department, Altınbas University, Mahmutbey Dilmenler St. No: 26 Bagcılar, Istanbul,Turkiye, ahmed.abdulsalam.neamah@gmail.com, ahmed.alasadi@ogr.altinbas.edu.tr. b Department of Medical Instrumentation Techniques Engineering, Al-Hikmah University College, Al Yarmouk 4 Street, Baghdad, Iraq, mohammed.ibrahim@hiuc.edu.iq c Head of the Mechanical Engineering Department, Altınbas University, Mahmutbey Dilmenler St. No: 26 Bagcılar, Istanbul,Turkiye, suleyman.basturk@altinbas.edu.tr *Corresponding author Email: mailto:ahmed.abdulsalam.neamah@gmail.com HIGHLIGHTS ABSTRACT  In this paper, we report on the production process for new composite material based on a metal matrix consisting of nanoparticles as an additive for improving and developing the performance of carbon brushes. We believe that this work should be of interest to readers in the areas of material science and engineering. The demand for carbon brushes with specific properties and improvements in production economics in recent years has led to increased interest in metal- graphite composites. Metal matrix composites are considered excellent materials to obtain properties superior to those of the constituent phases and meet the specific requirements of material application. In the present study, we suggested a new composite material by utilizing nanomaterials to improve the properties of metal-graphite composite material usually used as carbon brushes. This has been achieved by adding different percentages of 0.1-0.5wt % of carbon nanotubes, carbon nanospheres, or both to the metal matrix composite. The samples were prepared by powder metallurgy technique. The XRD results gave a sharp line and indicated a high crystalline structure and little amorphous, which improved the conductivity performance of the composite produced within the structure of this work. The density measurement chart results showed an increase in the amounts of the carbon nano additives leading to a decrease in the density of the sample. The investigation of nano additives on hardness showed that increases in the additive led to reduced hardness. On the other hand, the resistivity values have reduced gradually when there is an increase in the amounts of the carbon nano additives, especially on the CNT, which gives better results than CNS, which we obtained the resistivity value =(0.32 Ωcm), Comparing with commercial-grade containing free of nano additives (1.3Ω cm). ARTICLE INFO Handling editor: Akram R. Jabur Keywords: Arc discharge Composite Carbon nanotubes Graphite nanomaterial Powder metallurgy 1. Introduction The invention of electrical brushes is back in the last century in England. It had stages in development since then, accompanied by the motors and the clusters of copper wires, as was the form of the earliest brush. The motors, modified to provide higher power and higher performance, had made primitive brushes. After that, carbon brushes were invented, composed of carbonic material, solid lubricant, resin binder, and additives. [1]. The demand for carbon brushes with specific properties and improvements in production economics in recent years has led to increased interest in metal-graphite composites. Metal matrix composites are considered excellent materials to obtain properties superior to those of the constituent phases and meet the specific requirements of material application [2]. In the last twenty years, the world has witnessed an increase in a tendency toward the improvement of new materials due to the progress of technology and continuous demands for new devices; the requirements for the very suitable type of reinforcement and matrix that pushed for a new standard of working that formed new conditions which appealed a need to expand its useful applications in many industries fields. In a certain way, the metal matrix composite has new potential thanks to the developments in nano-size scale materials. That is why the relationship between the properties, components, and the production route is essential [3]. The unique features that exist in carbon nanomaterials, e.g., physical,