Effect of Pressure on Tribological Characteristics between Sintered Friction Materials and Steel Disk

The effect pressure on tribological characteristics between sintered metallic material and low alloy heat resistance steel was investigated under dry sliding condition with lab-scale dynamometer. Tests were conducted under continuous speed at 8m/s with various pressures. The results were analyzed with SEM (scanning electronic microscopy) and X-ray diffraction. Wear rate of friction materials was change with morphology of friction surface. Stable tribolayers at friction surface affect wear rate of friction material. Tribolayer which formed both friction surfaces was Fe(2)O(3). Contact temperature was as high as 385 degrees C at 1.0MPa. Also, high brake pressure promotes an increase in height difference on friction materials' contact surface thus trap wear debris which consider to increase friction coefficient.