Wear response of non-asbestos brake pad composites reinforced with walnut shell dust

• DOI: 10.1007/s41779-020-00452-6
• Publication Date: 2020-01-30T20:03:52Z
• Authors: Gülşah Akıncıoğlu; Sıtkı Akıncıoğlu; Hasan Öktem; İlyas Uygur
• Keywords: Optimization; Behavior; Chase type device; Tribological Properties; Performance; 02 engineering and technology; Disc; Walnut shell dust; Sliding Speed; Automotive Friction Materials; Phenolic Composites; 0210 nano-technology; Porosity; Brake pads; Friction and wear test

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.