A new wear-resistant component system of copper-based composite materials: Modified sepiolite-complex ceramic powder

To balance mechanical strength, friction stability, and low wear, a novel wear-resistant component system: modified sepiolite-complex ceramic powder, was employed in copper-based composite materials, leading to the successful preparation of samples with outstanding mechanical and frictional performance. The material exhibits high friction stability, low wear, and the simultaneous occurrence of a high friction coefficient, which may be caused by uniquely composed dual friction film. The external layer of the friction film consists of Cu2O, Fe2O3, and CaO metal-films, while the internal layer consists of B2O3 film, graphite, and sepiolite. Additionally, modified sepiolite (composed of sepiolite, CaCO3 and enstatite) plays a dual role in wear resistance and high-temperature lubrication. Furthermore, the Gradient Boosting Decision Tree (Gbdt) model was found to provide more meaningful guidance for predicting friction coefficients.