With automobile numbers continuing to increase, competition among manufacturers of brake pads is also increasing along with the search for additives to serve as alternatives to the materials presently being used. In addition to the cost of the additives used, another important consideration in choosing materials is that they should be safe for the environment and human health. This study investigated the effect on braking performance of brake pads produced using walnut shell powder as a natural additive material. Two different types of brake pad samples were produced using 3.5 (2A) and 7% (2B) walnut shell dust in the contents. A commercial Clio brake tip was used as the reference (CO). The produced brake pads were subjected to thermal conductivity, friction wear, density, hardness and water and oil absorption tests and microstructure analysis. A Chase type device was used for wear friction tests, and the results were obtained according to SAE-J661(Brake Lining Quality Test Procedure) standards. The experimental data were compared with those of the commercial brake pads, and the performances of the natural additive brake pads were evaluated. The addition of walnut shell was shown to be compatible within the composition and exhibited a positive effect on the friction coefficient.

中文翻译：

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核桃壳粉尘增强的非石棉刹车片复合材料的磨损响应

随着汽车数量的持续增加，制动衬块制造商之间的竞争也在增加，同时也在寻求添加剂以替代目前使用的材料。除了所用添加剂的成本外，选择材料时的另一个重要考虑因素是它们应对环境和人体健康安全。这项研究调查了使用核桃壳粉作为天然添加剂材料生产的刹车片对制动性能的影响。使用含量为3.5（2A）和7％（2B）的核桃壳粉制备了两种不同类型的制动衬块样品。使用商用Clio刹车头作为参考（CO）。对制得的制动衬片进行导热性，摩擦磨损，密度，硬度以及吸水和吸油测试以及微观结构分析。使用Chase型设备进行磨损摩擦测试，结果根据SAE-J661（刹车衬里质量测试程序）标准获得。将实验数据与商用刹车片进行了比较，并评估了天然添加剂刹车片的性能。核桃壳的添加被证明在组合物中是相容的，并且对摩擦系数表现出积极的影响。