Effect of laser surface texturing on friction performance and surface damage of silicon nitride ceramic

Figures & data

Figure 1. SEM of the mirror-polished surface of Si₃N₄ ceramic: (a) Pore dispersion, (b) grain shape.

Figure 2. The schematic diagram of triangular patterns (a) and hexagonal patterns (b).

Figure 3. The schematic diagram of friction test.

Figure 4. COF value of Si₃N₄ ceramic with different LST patterns as a function of the sliding time under the different loading force: (a) 5 N, (b) 10 N, (c) 15 N.

Figure 5. The average COF value as a function of the loading force plot.

Figure 6. SEM of worn surface at the loading force of 5 N.

Figure 7. SEM of worn surface at the loading force of 10 N.

Figure 8. SEM of worn surface at the loading force of 15 N.

Figure 9. EDS analysis at area a and area B from HP under the loading force of 15 N in Figure 8(c).

Figure 10. The wear rate of the WC ball under different loading force.

Figure 11. Schematic diagram of the mechanism of friction process: (a) Un-textured sample, (b) textured sample.

Figure 12. Distribution of friction force (F) and the surface area (S) on the textured samples: (a) TP, (b) HP.