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Vehicle emissions cause serious environmental problems, especially in industrial areas and populated areas. Although exhaust emissions are tried to be reduced by legal regulations, it is clear that non-exhaust emissions also increase significantly. Brake wear emissions are one of the most important sources of non-exhaust emissions. Brake wear particles are usually result from a cast-iron disc and a composite pad pair that is accompanied by friction. The chemical composition of these materials affects the content of the wear particles. The purpose of this study is to investigate the chemical and microstructural characterization of brake wear emission material of brake discs and pads commercially available to the market by Original Equipment Manufacturers (OEMs). Microstructure characterization of the wear particles was analyzed with field scanning electron microscopy (SEM); elemental analysis was conducted with energy dispersing spectrometer (EDS); crystal structures were analyzed with X-ray diffraction (XRD), and molecular bond structures were analyzed with the aid of fourier-transform infrared spectroscopy (FTIR). As a result of the analysis, it was found out that elements such as C, N, O, F, Si, Ca, Fe and Cu; sulfates, phosphates, oxides, and different mineral structures exist in the chemistry of wear particles. Especially, the presence of oxidized structures and heavy metals, pose a serious threat to human health and the environment. This study will provide important information for policymakers and researchers.

Taşıt Freni Aşınma Parçacık Emisyonlarının Mikroyapısı ve Kimyasal Analizi