Abstract
An experimental study of different friction materials namely GCI, Sintered Fe based brake pad employed in MIG-21 fighter aircraft, and newly developed brake pads by a novel P/M technique other than compacting and sintering based on hot powder forging are studied. The friction and wear characteristics of these friction materials were analyzed by using pin-on-disc wear testing machine. The parameters for wear test are two loads (low and high) at constant sliding speed; these are fixed for all friction materials. The experimental results include measurement of COF and wear loss. Average values of COF and specific wear for these friction materials are compared. The temperature rise in the pin near to wearing surface and the noise level are measured. The results of wear test show that the developed brake pad is much better than GCI and sintered pad. The COF of the sintered pad and developed pad are in same range. But the developed pads offer high wear resistance and low temperature rise for long period of time than the sintered pad and GCI. Thus, these properties of the developed friction pads show a bright scope as an initial step to further work on this technique. The characteristics of friction materials are also monitored by hardness, and density measurements.
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