Borawski Andrzej
Faculty of Mechanical Engineering, Bialystok University of Technology, PL-15351 Bialystok, Poland.
Materials (Basel). 2023 Jan 12;16(2):749. doi: 10.3390/ma16020749.
Brakes play an extremely important role in any vehicle. In today's automotive industry, friction brakes are most often used, in which the composite material of the brake pad cooperates with a cast iron disc. While little can be modified in the case of discs, in the case of pads, the composition of the material used for its production can have an almost unlimited number of possibilities. Both scientists and manufacturers invent and test new combinations to achieve the desired end result. A similar task was undertaken in this work. Bearing in mind the fact that materials commonly used as reinforcing materials generate undesirable threats in the production process, it was decided to check whether this role could be taken over by another substance that is already present in brake pads; this substance is copper. A number of samples containing copper, in the form of powder and fibers, were made, and then the samples were subjected to tribological tests in order to determine the coefficient of friction and abrasive wear rate. The ball-cratering research method was used, and the Taguchi process optimization method was used to plan the experiment. As a result of the tests, it was found that the replacement of aramid fibers with copper fibers does not significantly affect the value of COF and the abrasive wear rate.
刹车在任何车辆中都起着极其重要的作用。在当今的汽车行业中，摩擦刹车最为常用，其中刹车片的复合材料与铸铁盘配合使用。虽然对于盘来说几乎没有什么可改进的，但对于刹车片而言，用于其生产的材料成分几乎有无限多种可能性。科学家和制造商都在发明和测试新的组合，以实现预期的最终结果。这项工作也进行了类似的任务。考虑到常用作增强材料的材料在生产过程中会产生不良威胁，因此决定检查这种作用是否可以由刹车片本身已含有的另一种物质来承担；这种物质就是铜。制作了许多含有粉末状和纤维状铜的样品，然后对这些样品进行摩擦学测试，以确定摩擦系数和磨料磨损率。采用了球坑研究方法，并使用田口过程优化方法来规划实验。测试结果表明，用铜纤维替代芳纶纤维对摩擦系数值和磨料磨损率没有显著影响。
