Sintered and friction properties of cu base sintered friction material have been investigated. Powder mixture of 71.4Cu, 11.7Fe, 4.4 $SiO_2$, 9.9 graphite, 0.5 $MoS_2$, and 2.1 Pb (in wt%) have been compacted under 2.3ton /$cm^2$(230 MPa) in a floating die into cylindrical pellets of 20.2mm diameter and approximately 2mm height. The pellets separated by backing steel plates have been diffusion bonded and sintered at various temperatures (800, 900, 950 and 965$^\circ{C}$) under various pressures (15, 20, 30 Kg/$cm^2$). Under constant pressure, the porosity decreased, and the radius of sintered compact and sintered hardness increase with temperature; a remarkable change is observed by raising temperature from 950$^\circ{C}$ to 965$^\circ{C}$. As the pressure increase under constant temperature, sintered density, compact radius and sintered handness increases gradually.
Under constant pressure, no appreciable difference of the sintered density is observed in the specimens sintered at 900$^\circ{C}$ and 950$^\circ{C}$. However, a notable increase of density results by raising the temperature to 965$^\circ{C}$. Such salient difference of sintered properties in the specimens sintered at 965$^\circ{C}$ and at other temperatures would be due to the change of melt content and properties at the sintering temperatures. Friction properties of sintered specimens have been measured by a constant speed friction tester under 10 Kg/$cm^2$ with 7.8m/sec for 10min (500 cycles). Commercial sintered friction material has also been tested under the same condition. As the sintered hardness increases, friction coefficient and wear rate decreases slightly The specimens sintered under 20-30 Kg/$cm^2$ at 900$^\circ{C}$ or 965$^\circ{C}$ show similar friction and wear properties to those of commercial material.
