In this paper, by studying the high-speed emergency braking performance of copper-base brake pads with different MoS₂ contents and the corresponding structure of tribo-film, the adjusting function of MoS₂ was revealed, which is mainly achieved by the reaction of MoS₂ with Cu and Fe. The hard reaction products enhance the strength of the matrix and thus increase the resistance of plastic deformation. However, excessive addition of MoS₂ in the matrix leads to the reduced particle size of Fe and the increased matrix discontinuities. Those reduce the deformation resistance of friction surface and the ability to hinder the movement of substances on friction surface, thereby resulting in formation of eddy structure on friction surface of the samples containing high content of MoS₂ during high-energy braking. For the sample containing the optimum content of 2 wt % MoS₂, the friction coefficient is relatively high and the wear loss is only 17.13% and 5.05% of the samples without MoS₂ and with 10 wt % MoS₂, respectively. The abnormal high wear loss and the reduction of friction coefficient is mainly determined by the dynamic process of formation and delamination of the eddy structure.

本文通过研究不同MoS ₂含量的铜基刹车片的高速紧急制动性能以及相应的摩擦膜结构，揭示了MoS ₂的调节功能，这主要是通过对MoS ₂的反应来实现的。 MoS ₂与铜和铁。硬反应产物增强了基体的强度，从而增加了塑性变形的抵抗力。但是，过量添加MoS ₂基质中的杂质导致Fe的粒径减小和基质不连续性增加。这些降低了摩擦表面的抗变形性以及阻碍了物质在摩擦表面上移动的能力，从而导致在高能量制动期间在包含高MoS ₂含量的样品的摩擦表面上形成涡流结构。对于最佳含量为2 wt％MoS ₂的样品，摩擦系数相对较高，磨损损失仅为不含MoS ₂和10 wt％MoS ₂的样品的17.13％和5.05％。， 分别。异常高的磨损损失和摩擦系数的降低主要取决于涡流结构形成和分层的动态过程。