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This study was aimed to investigate the influence of reinforcement content on the physical properties and wear behaviour of composite pure aluminium reinforced with palm shell activated carbon (PSAC). Pure aluminium was reinforced with 0 %, 5 %, 10 %, 15 % and 20 % by weight of PSAC and then compacted at 200 MPa followed by sintering at 500 • C for 2 h. Quantitative analysis on dry sliding wear behaviour was investigated by means of pin-on-disc wear testing machine. Wear rates of the composite were determined at fixed applied load (10 N) and sliding velocity (150 rpm). Optical micrograph showed that an increasing PSAC content had resulted in increasing of pores in the composites. The hardness and density decreased with the addition of PSAC content. They were reduced drastically with the amount of PSAC content more than 10 wt.%. The cumulative wear rate of the specimens was observed decreased with the amount of PSAC content less than 10 wt.% PSAC and increased with PSAC content more than 10 wt.%. The optimum content of PSAC was found to be 10 wt.% in order to achieve optimum wear resistance. K e y w o r d s : dry sliding wear, aluminium matrix composite, pin-on-disc, palm shell activated carbon

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Brake pads are important safety devices in vehicles. An effort to avoid the use of asbestos in brake pads has led to the development of asbestos-free brake pads that incorporate various organic and inorganic fillers. Palm slag as a filler in brake pads was investigated in this paper. Different processing pressures were employed during production of samples through compression molding. The properties examined included hardness, compressive strength, and wear behavior. The results showed that brake pad samples prepared with 60 tons of compression pressure resulted in the most desirable properties. Hence, palm slag has its own potential for use as a filler in asbestos-free brake pads.

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