In this study, an organic brake pad content was created to increase the overall tribological performance of the automobile brake system. Brake lining samples were obtained by hot molding method using juniperus drupacea cones powder which is not found in the literature in addition to barite, phenolic resin, fiber types (glass, carbon and basalt) and coke in the lining content. In order to determine the most ideal production conditions and content ratios, parameter combinations based on the L18(21 × 35) Taguchi orthogonal index were used according to the density, hardness, wear rate, friction coefficient objective functions. The density and hardness of the samples produced based on the orthogonal design were measured. A wear test was performed on a pin-on-disc type tribometer and the wear rate and friction coefficients were calculated according to the obtained values. Signal to noise ( S/N) ratio and ANOVA analysis were performed to determine the brake pad composition with the most ideal tribological properties. According to the results, the mixing time is 15 min., the molding temperature is 160 °C, the molding pressure is 100 MPa and the molding time is 15 min., have been found to be the optimum production conditions. In addition, it was observed that the density and hardness decreased as the amount of juniperus drupacea cone powder was increased. For this reason, it has been observed that the juniperus drupacea cone powder used for the first time in the brake lining composition can be used in lining content up to 25%, preferably up to 10% by weight.

This paper presents experimental data using estimated approach to determine some mechanical properties of epoxy matrix based composites. For this reason, the epoxy matrix was made composite with the powdered materials obtained from different parts of the juniperus drupacea seeds. In order to obtain a homogeneous structure ultrasonic mixing technique was preferred. As an experimental estimation approach, the Taguchi method that is an alternative way to characterize complex composite structures, to come from above the problems and to investigate the effects of test parameters-factors by performing a few experiments was used. In the study, the L9 Taguchi orthogonal array has been preferred. Based on some production conditions; bio-reinforcement material has lowered the average hardness value to 4.22 and formed a more soft structure in addition to improving the tensile strength value by 46% compared to the neat sample. Parametric study showed that; the most important parameter affecting hardness and tensile strength are the mixing time and reinforcement ratio, respectively.

In this study, samples which can be used as brake pads are prepared. A mixture of 50% barite by mass, 20% glass fiber, 25% phenolic resin and 5% coke powder was prepared, and 6 samples were prepared by adding juniperus drupacea nut powder (JDNP) at 10%, 25% and 40%. The samples were produced in 3 different mixing times, 2 different compaction times, 3 different compaction temperatures and 3 different compression pressures. The effect of the compression pressure on the wear rate, hardness, density and cold friction coefficient was investigated. The wear rate ranges from 0.093.10 -7 -4.235.10 -7 cm 3 .N -1 .m -1 . The coefficient of cold friction ranges from 0.30 to 0.48. The density is between 1.82-2.17g/cm 3 . The hardness values are from 85 to 117 according to the Rockwell R scale. Wear rate and cold friction coefficient values are in accordance with TS 555 standard. It has been determined that the compressive pressure is most affected by the hardness and friction coefficient. Generally, rise of pressure reduces hardness and friction coefficient. The effect of density on JDNP ratio is opposite.

This work is aimed to study the mechanical and physical properties of composite friction materials (CFMs) produced by using various fiber types (glass, carbon, and basalt) filled and unfilled Organic Juniperus Drupacea Cone Powder (JDCP). The CFMs were tested by using a pin-on-disc tribo-test-rig under dry contact conditions. The JDCP gradually reduced the density of CFMs. The surface hardness of the CFMs exhibited a decreasing trend with the addition of JDCP filler. The presence of JDCP within the CFMs considerably increased the water and oil absorption. The results showed that the JDCP filled and unfilled basalt fiber reinforced CFMs had higher friction coefficients than JDCP filled and unfilled glass and carbon fiber reinforced CFMs. In addition, the friction coefficient of filled and unfilled carbon fiber reinforced CFMs was found to be the lowest. The tensile strengths obtained from the indirect tensile (Brazilian) test of basalt, glass and carbon fiber reinforced test CFMs increased with JDCP filler. In addition, the tensile strength of JDCP filled and unfilled carbon fiber reinforced FCMs proved to have better wear resistance than all other CFMs. The wear resistance of basalt, glass, and carbon fiber reinforced CFMs decreased with the increase of JDCP wt.% filler. Among JDCP filled and unfilled all CFMs, the highest wear resistance was detected in carbon fiber reinforced CFM. The minor wear resistance was seen in glass fiber reinforced CFMs than carbon and basalt reinforced samples.