Preparation and tribological properties of W_0.97Mo_0.03Se₂ nanosheets

摘要

The W0.97Mo0.03Se2 nanosheets have been successfully prepared by a facile reaction in closed reactor at moderate temperature. The thermal (750°C) solid-state reaction between the ball-mixed of micro-sized selenium, tungsten and molybdenum powders yielded a high yield of W0.97Mo0.03Se2 nanosheets. The as-prepared products were characterized by XRD, SEM, and TEM. SEM images showed that the morphologies of the as-prepared products changed with the reaction temperature and duration. The tribological properties of the as-prepared products as additives in the HVI500 base oil were investigated by UMT-2 multispecimen tribotester. The friction coefficient of the base oil containing W0.97Mo0.03Se2 nanosheets was lower and more stable than that of the base oil.