Effects Of Abrasives On Friction Performance Of Ceramic Friction Materials

As a new type of friction materials, ceramic friction materials not only have excellent friction performance such as friction coefficient smooth and low wear rate like the traditional semi-metallic friction materials, but also has overcome the disadvantages of semi-metallic friction material like brake noise, high density. It is a new development direction of the friction materials. But the theoretical study of ceramic friction materials reported in the literature now seen less. In this paper, three different abrasives (SiC, Al₂O₃, ZrSiO₄) in different size and different content was used in the ceramic friction materials and the effects of abrasives on friction performance of ceramic friction materials was tested. With a view to the new friction material on the theory and practical applications provide a basic theoretical.Raw materials choice was based on the following four principles:â‘ selecting those abrasives with high hardness which can improve the friction coefficient of ceramic friction materials significantly;â‘¡select those raw materials which have good wear resistance when they combine with group;â‘¢selecting those raw materials that have special functions;â‘£selecting those raw materials which can cut the cost but don't degrade friction performance. And the raw materials used was listed by following: Kevlar fiber, Potassium-titanium crystal, Brass fiber, Wollastonite, Barium sulfate, NBR powder, Phenolic resin, Silicon carbide, Alumina, and Zirconium silicate.This paper's main work is as follows:1. The raw materials used were selected according to the above-mentioned methods. Latin square coupled with Golden Section approach was utilized for experimental formulations design. Friction performance of semi-metallic friction material samples was tested. The friction layer was characterized by SEM and EDX.2. Through friction performance testing, and compare the different in the friction performance of the different ceramic friction materials, research the effects of abrasives on friction performance of ceramic friction materials.3. In the three kinds of hard materials, SiC has highest hardness and the effects on enhance friction coefficient of ceramic friction materials is most obvious. So separately compare the effects on the friction performance of ceramic friction materials of three kind of SiC in different size and different SiC volume content of the ceramic friction materials.4. Through friction performance testing, identified the best volume content of the abrasives in the ceramic friction materials. That the best volume content of the abrasives in the ceramic friction materials is 5.6 percent. Otherwise, the impact of enhance friction coefficient was not obvious.