Tribological Behaviour of Metal Matrix Syntactic Foams
摘要
The tribological performance of the aluminium syntactic foams in dry and lubricated sliding conditions was studied using a pin-on-disc tribometer. The syntactic foams reinforced by the cenospheres were manufactured with the stir casting technique. The tribological performance of the syntactic foams was compared with the tribological properties of the base matrix. The result of the varying applied load and the porosity on the wear rate was reported. The applied loads used for the study were 5, 10, 15, 20, and 25 N. The wear rate increased with the applied load, and the effect of porosity was visible at the higher loads. The load applied on the sample has a higher impact when the magnitudes of the loads were lower. At higher loads, the effect was lower, but the linear relationship still exists between the applied load and the wear rate. This may be due to the change of wear mechanism between 10 and 15 N loads. Similar trends were visible for the lubricated sliding conditions, but the magnitude of the wear rate was nearly 10% of the wear rate in dry sliding conditions. The scanning electron micrographs show that adhesive wear was prominent at higher loads and abrasive wear at lower loads.