UTHM Institutional Repository

Fabrication of carbon brush by using palm oil shell for railway application

Mohamad Zawahid, Sakinah (2016) Fabrication of carbon brush by using palm oil shell for railway application. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Carbon brush is a small block made of mostly carbon and graphite which is used as a current transmitter between stationary and moving part of electric generator or motor. Carbon brush is typically produced by using mineral graphite which is an allotropic form of carbon as the raw material beside the addition of fillers such as copper in order to enhance the mechanical ability of the carbon brush. In order to achieve a sustainable environment and good natural resources management for the future generation, the usage of graphite from natural resources for the fabrication of the carbon brush need to be reduce. This research is conducted in order to minimize the usage of the graphite as the raw material by replacing it with carbon from palm oil shell for the fabrication of carbon brush for railway application (Light Rail Transit). This study also intended to investigate the properties differences of the carbon brushes by preparing it with several compositions and compared it with the commercial carbon brush. In obtaining the carbon precursor, the palm oil shells were prepared at 400°C, 500°C and 600°C. The carbon brush samples were prepared with the combination of carbon, copper, polyethylene glycol and phenolic resin at four different ratios. The mixture were then shaped into cylindrical shape and sintered at 800°C in the tube furnace for an hour. The results show that the sample type 45C 35Cu posses the best mechanical properties in term of hardness and conductivity compared to the others. For conductivity properties of the carbon brush, copper powder usage were essential as it will provide good conductivity which were proven where the highest conductivity were achieved for sample 45C 35Cu which is 84.9x10^(-3) siemens per cm. Hardness of 45C 35Cu samples were recorded to be at 50.67 duro which lead to the lowest wear rate which is 0.004 g/min.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2000-2891 Dynamoelectric machinery and auxiliaries
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 21 Jun 2017 03:44
Last Modified: 21 Jun 2017 03:44
URI: http://eprints.uthm.edu.my/id/eprint/9159
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