Abstract Airborne wear particles emitted from transport vehicle brakes are one of the main sources of toxic metals in inhalable particulate matter. Prediction of wear particle emissions may become more accurate if the relationship between the wear and particle emission characteristics is known. An experimental study was performed to investigate proportional correlations between the mass wear, 0.01–0.42 μm particle emission measured by a NanoScan SMPS Nanoparticle Sizer (SMPS) and 0.3–10 μm particle emission measured by an Optical Particle Sizer (OPS). Several car brake low-metallic materials in the form of pin samples were tested against steel disc samples at different values of the contact pressure and sliding velocity. The pin-on-disc friction pair was placed in a clean chamber to eliminate external particle sources. The obtained results suggest a strong proportional correlation between the disc sample wear and pin sample wear. OPS and SMPS particle concentrations were also revealed to strongly correlate between each other. By contrast, the disc sample wear exhibited weak correlations with the particle concentrations for most of the materials.

中文翻译：

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汽车刹车摩擦材料磨损与空气中磨损颗粒排放量的相关性

摘要 运输车辆制动器释放的空气中磨损颗粒是可吸入颗粒物中有毒金属的主要来源之一。如果磨损和颗粒排放特性之间的关系是已知的，则磨损颗粒排放的预测可能变得更加准确。进行了一项实验研究，以研究质量磨损、由 NanoScan SMPS 纳米粒度仪 (SMPS) 测量的 0.01-0.42 μm 粒子发射与由光学粒度仪 (OPS) 测量的 0.3-10 μm 粒子发射之间的比例相关性。在不同的接触压力和滑动速度值下，针对钢盘样品对以销样品形式存在的几种汽车制动器低金属材料进行了测试。销盘摩擦副被放置在一个干净的腔室中以消除外部颗粒源。获得的结果表明圆盘样本磨损和销样本磨损之间存在很强的比例相关性。OPS 和 SMPS 粒子浓度也被揭示彼此之间有很强的相关性。相比之下，对于大多数材料，圆盘样品磨损与颗粒浓度的相关性较弱。