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Abstract The main observations and findings of the present study may be summarized on the following :- 1- A general trend of decrease in friction traction as contact load and speed increase has been observed for all the three composites. The high level of friction tractions was recorded for material C, where’s material A showed the lowest trend.Materials 8 and C indicated a sensitivity to the applied contact load rather than material A which showed a DROP in friction followed by a substantial increase, especially at speeds 4.6 and 6.7m/s. 2- A general decrease in friction coefficient as sliding speed increases was observed. from the comparison of the three materials, it has been found that, material C showed the highest values of friction traction, whilst, material 8 gave the lowest. Material A was found to be sensitive to the sliding speed changes. The decrease of friction with both load and speed reduces the ability of using such materials in places, where high levels of braking or transmitting loads should be essential. 3- A general trend of friction coefficient decrease with frictional heat increase has been observed up to about 50kj, followed by an equlllbrium region nearly between 50kj and 80kj, then unsubstantial increase in friction coefficient has been recorded after 80kj 4- For composite material 8 the fluctuations of friction coefficient with time is unnoticeable, however, for material A and C no fluctuations in friction coefficient with time have been observed 5- Moreover, a decrease in Friction coefficient was observed as applied load increase for all temperatures. High friction coefficient values were recorded for B. Iow values of friction traction were observed for material C, whilst material A gave nearly the modest friction behavior for all temperature ranges. 6- Considering the contact temperature effects, it has been observed that an initial decrease in coefficient of friction as surface temperature increase was |