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Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology ( IF 2 ) Pub Date : 2021-05-26 , DOI: 10.1177/13506501211018953
Kottur Asrar Ahmed 1 , Shahul Hameed Rasool Mohideen 1 , Moothapuram Arunachalam Sai Balaji 1 , Paramathma Baskara Sethupathy 2
Affiliation  

Brake friction linings are made of materials with a highly complex formulation that helps in improving the braking performance. The selection of friction materials with good physical, mechanical, and thermal properties is vital, which will decide the braking performance. Apart from giving good physio-mechanical properties, metallic fillers act as heat dissipaters. The objective of this work is to study the synergetic effect of prominent heat dissipaters, namely copper fibers, brass fibers, and zinc powders. Three simplified formulations were developed with 10, 14, and 18 wt.% of these heat dissipaters and named DB1, DB2, and DB3, respectively. It was observed that the addition of heat dissipaters increased the thermal properties. Tribological properties are tested based on SAE J661 standards. It was observed that DB2 had a consistent and higher coefficient of friction of 0.503 with a higher wear rate (7.6%) while DB3 had adequate μ and lower wear rate. The same batches of brake pads were tested in an inertia brake dynamometer following JASO C406 and a wear test was carried out. It was observed that % fade and % recovery were better for DB2 in both cycles. The wear rate in terms of thickness was lesser for DB2 followed by DB1 and DB3. The wear mechanism was analyzed using a scanning electron microscope. The preference selection index method of optimization was used to evaluate the overall performance parameters of the brake friction composites. Heat dissipaters with 14 wt.% have proved to be the better performers, followed by 10 and 18 wt.%.



中文翻译:

金属填料作为散热剂对非石棉盘式刹车片的摩擦学性能的协同作用

制动摩擦片由具有高度复杂配方的材料制成,有助于改善制动性能。选择具有良好物理,机械和热性能的摩擦材料至关重要,这将决定制动性能。除了提供良好的物理机械性能外,金属填料还可以起到散热作用。这项工作的目的是研究主要的散热器,即铜纤维,黄铜纤维和锌粉的协同作用。开发了三种简化的配方,其中分别有10、14和18 wt%的这些散热器,分别命名为DB1,DB2和DB3。观察到,添加散热器增加了热性能。摩擦性能是根据SAE J661标准进行测试的。μ和更低的磨损率。遵循JASO C406,在惯性测功机中测试了相同批次的刹车片,并进行了磨损测试。可以看出,在两个周期中,DB2的淡入度和恢复率都更好。对于DB2,其次为厚度的磨损率较小,其次是DB1和DB3。使用扫描电子显微镜分析磨损机理。通过优化的优先选择指标法对制动摩擦复合材料的整体性能参数进行评估。事实证明,具有14 wt。%的散热性能更好,其次是10和18 wt。%。

更新日期:2021-05-26
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