3.4.2. Analysis of Wear Morphology

Figure 15a–e shows the wear morphology of the untreated samples with different carbon content. It can be seen that a large amount of spalling and deep furrows occurs during the wear process, especially when the carbon content is low. Therefore, the main wear forms of the untreated sample are adhesive wear and abrasive wear.

**Figure 15.** Wear morphology of the untreated samples: (**a**) A1, (**b**) A2, (**c**) A3, (**d**) A4, and (**e**) A5.

Figure 16a–e shows the wear morphology of the laser biomimetic samples with different carbon content. Compared with the wear morphology of the untreated sample, it can be seen in the difference between the unit and the matrix that the unit does not have large peeling or deep furrow phenomena, indicating that the wear resistance of the unit is better than that of the matrix. By comparing the wear morphology of LR-A1-LR-A5, it can be seen that the density and depth of the furrows on the units also gradually reduced, indicating that with an increase of carbon content, the wear resistance of the laser biomimetic samples also gradually improves. This process corresponds to the weight loss and the hardness of the unit.

**Figure 16.** Wear morphology of the bionic samples: (**a**) LR-A1, (**b**) LR-A2, (**c**) LR-A3, (**d**) LR-A4, and (**e**) LR-A5.
