Research on the Effect of Frictional Heating on Tribo-Magnetization of Ferromagnetic Materials

The tribo-magnetization process is significantly affected by thermal demagnetization resulting from frictional heating. However, an effective method for evaluating and controlling this dynamic influence on magnetization during sliding remains lacking. Herein, magnetization process against sliding is investigated at different sliding speeds under three distinct sliding conditions: ambient condition, liquid nitrogen and lubricated condition. Results reveal that the thermal demagnetization effect notably impacts tribo-magnetization at sliding speeds of ≥ 125 mm/s. A novel evaluating method of frictional heating is also proposed based on tribo-magnetization behavior during sliding. The impact of frictional heating on tribo-magnetization has been evaluated by applying the external magnetic field of 3 Oe and 5 Oe. Experimental results suggest that sliding-induced magnetization effect can be easily modified under external magnetic field for the sliding speed ≥ 180 mm/s. These insights provide valuable guidance for controlling magnetization process and assessing the friction heating on the sliding interface, while also enhancing the precise application of tribo-magnetization in wear monitoring.