Elastomeric materials show promise as potential micro-fillers in brake linings. They can provide vibration damping and acoustic advantages in intermittent and abrupt impact applications such as braking. The elastomeric material can be salvaged from non-biodegradable automotive tires, thereby providing an opportunity to reuse materials that will otherwise be discarded in landfills. Both tribological and thermomechanical performances of the waste tire rubber were assessed to determine their potential for use as micro-fillers in the brake linings of commercial vehicles with a gross weight less than 16 tons. Accordingly, the brake lining materials were fabricated with fine waste tire rubber particulates (WTRPs) as the micro-fillers, phenolic-R resin as the binder, graphite as the dry lubricant, laterite as the co-filler, and coconut coir for natural fiber reinforcement. The effects of increasing the WTRP weight fraction on the brake response of the linings were analyzed, and the different compositions were benchmarked against a commercial brake lining. Mechanical characterization comprising compressive strength, hardness, density, and porosity studies were carried out. Frictional and wear characteristics of the linings were analyzed using a rotary tribometer with simultaneous thermal monitoring. The manufactured lining with 15 wt% WTRPs exhibited a mean friction coefficient of ~0.38, a specific volumetric loss rate of 1,662 µm³/(N·m), and improved thermal response. Using optical microscopy and scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), wear surface morphology studies compared the relative development of primary and secondary plateaus and revealed the redistribution of wear debris, leading to the stability of the coefficient of friction.

中文翻译：

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废轮胎橡胶在汽车制动衬片材料中作为微填料的摩擦学响应

弹性体材料显示出有望作为制动衬片中潜在的微填料。它们可以在间歇性和突然冲击的应用（例如制动）中提供减振和声学优势。可以从不可生物降解的汽车轮胎中回收弹性体材料，从而提供了重新使用原本将被丢弃在垃圾填埋场中的材料的机会。对废旧轮胎橡胶的摩擦学性能和热机械性能进行了评估，以确定它们有潜力用作总重小于16吨的商用车制动衬片中的微型填充剂。因此，制动衬片材料是用细的废轮胎橡胶微粒（WTRPs）作为微填料，酚醛R树脂作为粘结剂，石墨作为干润滑剂，红土作为共填料来制造的，和椰子纤维用于天然纤维增强。分析了增加WTRP重量分数对衬片制动响应的影响，并针对不同成分对商用制动衬片进行了基准测试。进行了包括抗压强度，硬度，密度和孔隙率研究在内的机械表征。使用同时进行热监测的旋转摩擦计分析了衬里的摩擦和磨损特性。生产的WTRPs为15 wt％的衬里的平均摩擦系数约为0.38，比体积损失率为1,662 µm 进行了包括抗压强度，硬度，密度和孔隙率研究在内的机械表征。使用同时进行热监测的旋转摩擦计分析了衬里的摩擦和磨损特性。生产的WTRPs为15 wt％的衬里的平均摩擦系数约为0.38，比体积损失率为1,662 µm 进行了包括抗压强度，硬度，密度和孔隙率研究在内的机械表征。使用同时进行热监测的旋转摩擦计分析了衬里的摩擦和磨损特性。生产的WTRPs为15 wt％的衬里的平均摩擦系数约为0.38，比体积损失率为1,662 µm³ /（N·m），并改善了热响应。使用光学显微镜和扫描电子显微镜（SEM）结合能量色散光谱（EDS），磨损表面形态研究比较了初级和次级高原的相对发展，并揭示了磨损碎片的重新分布，从而导致了摩擦系数的稳定性。