Friction and Wear Properties of Silicon Nitride-Based Composites with Different hBN Content Sliding against Polyether-Etherketone at Different Speeds under Artificial Seawater Lubrication

In the present study, friction and wear behaviors of Si3N4-hBN(Hexagonal boron nitride) ceramic composites against polyether-etherketone in artificial seawater were investigated, sliding speed was varied from 0.52 to 1.73 m/s study effect. It found that coefficients rates decreased with increase for Si3N4-hBN (with hBN content ranging 5% 20%) PEEK(Polyether-ether-ketone); pairs represented an upward trend as increased 0 30%) PEEK. This result mainly attributed complex resistance sources, such mechanical meshing shear strength soft tribofilm. On other hand, both had a significant effect on tribological performance Si3N4-hBN/PEEK pairs. Meanwhile, lowest coefficient 0.07 below 10?6 mm3/Nm obtained Si3N4-20%hBN/PEEK pair at m/s.