Effects of Boron minerals on the mechanical and tribological properties of brake friction materials
Sugözü, Banu | Sugözü, İlker
Brake liningsrise to high temperatures as a result of friction. The high temperature caused by friction causes brake weakening and extends the stopping distance of the vehicle as an undesirable situation. In this study, high temperature resistant boron minerals Colemanite, Ulexite, Borax and Boric Acid were used in brake lining content. Colemanite, Ulexite, Borax and Boric Acid have been added to the brake lining content at rates of 1%, 3%, 5% and 7% by mass. Friction and wear performances of the produced brake liningswere determined with a pin-on-disc tester. As the Bo mineral content increased, the friction performance of the brake lining increased positively. Depending on the increase in boron mineral, hardness and density values also increased. It has been determined that it is appropr...
Effect of Ulexite and Boric acid on the friction characteristics of non-asbestos brake pad
Sugözü, Banu | Sugözü, İlker
Brake pads are used to slow down or stop the vehicle by applying force to the disc surface. The most important parameter in brake pad is friction coefficient. The higher the friction coefficient, the shorter the braking distance will be. Different materials are used to increase the friction performance of the brake pad. A limited number of studies have been carried out to increase the friction performance of brake pads by using boron mineral with high temperature resistance. In this study, brake pad was produced by using boron mineral ulexite and boric acid and its effect on braking performance was investigated. Four different brake pad samples containing 1%, 3%, 5%, 7% ulexite and boric acid were produced by powder metallurgy method. Production parameters are the same for all brake pad sa...
INVESTIGATION OF ULEXITE USAGE IN AUTOMOTIVE BRAKE FRICTION MATERIALS
Sugözü, Banu
The automotive brake pads are multi-component composites made up of many materials. There are many studies in the literature exploring the use of many different materials in brake pads. In this study, the use of ulexite which is a commercially valuable derivatives of boron that 65% of the total world reservations exists in Turkey were researched for brake pad material. For this purpose, three brake pad specimens containing ulexite differing in amount (3, 6 and 9 wt.%) were produced by a conventional procedure for a dry formulation following dry-mixing, pre-forming and hot pressing. The density of the specimens was determined based on Archimedes principle in water. The surface hardness of all brake pad specimens was measured using Rockwell hardness tester. The friction performance of the br...
Friction and Wear Behavior of Fiber Reinforced Polymer-Matrix Composites Containing Ulexite and Pinus Brutia Cone Dust
Sugözü, Banu
In this study, the usability of ulexite and pinus brutia cone dust (PBCD) in friction composites were investigated experimentally. Polymer-matrix composite (PMC) samples were manufactured by powder metallurgy method. Produced samples with the same contents were compared with those of heat-treated. A special design friction tester was used to determine friction properties such as wear rate and friction coefficient. The results showed that ulexite and PBCD can be used as filler material in friction composites. The results also indicated that heat treatment improved the properties of the samples.