Utilization of Silica from Palm Ash Waste as an Abrasive Material in Brake Friction Composite

Abstract:

The silica element in palm ash has the potential to be an alternative source of silica material to replace mineral silica, making it more environmentally friendly and reducing production costs. This research aims to utilize silica from palm ash waste as an abrasive material in brake friction composites. The silica from palm ash was isolated by a leaching process using 1 M HCl solution at a temperature of 70 °C for 90 minutes. Isolated silica was then characterized by X-ray fluorescence (XRF). The composition of silica was varied by volume fraction (0, 2, 4, and 6%). The mixing process of the powder mixture was conducted using a chopper mixer for 5 minutes, The powder mixture is then hot compressed using uniaxial hot pressing at a pressure of 47 MPa and a temperature of 165 °C for 15 minutes. Post-curing of the samples was carried out at a temperature of 165 °C for 10 hours. The samples were characterized by density, porosity, hardness R-scale, friction coefficient, and specific wear rate. The research results showed that the palm ash was successfully purified with a silica content of 27.3% to 57.2%. Increasing volume fraction of palm ash silica decreases in density and hardness, while porosity increases. The sample with 4% volume of palm ash silica exhibited better friction performance and a lower specific wear rate. Palm ash silica has the potential to replace the silica mineral for brake friction composites.

• Periodical: Materials Science Forum (Volume 1134)
• Pages: 73-81
• DOI: https://doi.org/10.4028/p-33vQWt
• Online since: December 2024
• Authors: Putri Nawangsari*, Rosa Putra Cupu Dedi, Warman Fatra, Dedy Masnur
• Keywords: Brake Friction Composite, Friction Coefficient, Palm Ash, Silica, Specific Wear Rate

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