article · Jurnal Teknologi
The vehicle and passengers’ safety depends on the efficiency of the brakes, which work to convert kinetic energy into heat during the braking process through friction. Therefore, it is necessary to obtain a high-performance and stable coefficient of friction under different temperatures and operating conditions. The purpose of this paper is to improve the coefficient of friction and braking force at different operating condition as sliding speed 150, 300, 450 and 600 r.p.m, initial braking temperature 40, 70, 100, 130 ˚C, final braking temperature, braking time 60 seconds and deferent brake oil pressure 2.5, 5, 7.5, 10 bar for a ventilated disc brake system and used brake disc coating with (AL2O3 – 3 vol%) alumina for the coated disc brake sample with a brake pad containing (AL2O3 - 0.5 vol%) alumina and comparing it to commercial gray cast iron disc original with a brake pad containing (AL2O3 - 0.5 vol%) alumina. The experimental results indicate an improvement in the coefficient of friction and braking force for the coated disc with (AL2O3 – 3 vol%) alumina with a brake pad containing (AL2O3 - 0.5 vol%) and then, final operating temperature of a coated disc is relatively higher than to the results of the commercial disc without coating.
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DOI: 10.11113/jurnalteknologi.v88.24259
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