Surface Textured Palm Kernel Activated Carbon Reinforced Polymeric Composite As A Potential Self-Lubricating Bearing

Chong, Wei Sheng (2018) Surface Textured Palm Kernel Activated Carbon Reinforced Polymeric Composite As A Potential Self-Lubricating Bearing. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Surface Textured Palm Kernel Activated Carbon Reinforced Polymeric Composite As A Potential Self-Lubricating Bearing.pdf - Submitted Version Download (243kB)

Abstract

A bearing is a device that controls all the relative motion to the desired motion while reduces operating friction. Self-lubricating bearings are plain bearings working without the need of any external lubrication. self-lubricating bearings are classified into two types. The first type is dry bearings which have solid lubricant such as graphite or polytetrafluoroethylene. The other type is bearing which has its own liquid lubricant reservoir such as porous metal structure which acts as a well for oil and dimples on surface which holds greases. Effect of speed and load on the tribological performance of surface textured palm kernel activated carbon reinforced polymeric composite (PKAC-E) need to be investigated. The performance of surface textured palm kernel activated carbon reinforced polymeric composite are compared to conventional bearing material. PKAC powder weighted at 60% are mixed with epoxy weighted at 40%. is then fabricated into disk specimen by hot press moulding. The PKAC epoxy composite disc specimen is patterned using a CO2 laser surface pattering machine with pore diameter of 1000 μm with depth of 500 μm, contact ratio value of 0.21 and area density of 19%. The sliding experiments was performed with a ball-on-disc equipment in dry condition in room temperature. A microscope was then used to observe and analyse the morphology of wear tracks for both the ball bearing and discs. The wear track widths of the discs are also measured with the microscope at five different points and the average is calculated. Coefficient of friction of PKAC-E disk for textured and nontextured rises with sliding speed and applied load. Non-textured surface demonstrated a lower coefficient of friction at low speed and low load and at high speed and high load. Textured disc has a wider wear track on disc than nontextured disc which increases the wear of the material. Textured disc produced lower coefficient of friction at high speed and low load. PKAC has demonstrated to be the superior bearing material compared to SKD-II disc which is a conventional bearing material by producing lower coefficient of friction when tested at similar parameters.

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