Influence of spray distance on erosion wear resistance of plasma sprayed WC-12Co coating(4)

       Figure 3 XRD patterns of coatings at different spraying distances

Figure 3 XRD patterns of coatings at different spraying distances
Figure 3 XRD patterns of coatings at different spraying
XRD pattern of the coating of FIG 3 different spray distance
XRD pattern of the coating of FIG 3 different spray 2.2 The effect of spraying distance on the microstructure of the coating section 2.2 The effect of spraying distance on the microstructure of the coating section 2.2 Effect of spray distance sectional microstructure of the coating
Figure 4 shows the SEM morphology of the coating cross-section at different spray
Figure 4 shows the SEM morphology of the coating cross-section at different spraying distances;
4 is a cross-sectional SEM micrographs of various coating spray distance4 is a cross-sectional SEM micrographs of various coating spray distance
lor It can be seen from the figure that when the spraying distance is 120 mm, the coating deposition thickness is the largest, the coating thickness is about 458 μm (see Table 3), the porosity is 11.73%, and there is a large-sized hole inside the coating It can be seen from the figure that when the spraying distance is 120 mm, the coating deposition thickness is the largest, the coating thickness is about 458 μm (see Table 3), the porosity is 11.73%, and there is a large-sized hole inside the coating
It can be seen from the figure that when the spraying distance is 120 mm, the coating deposition thickness is the largest, the coating thickness is about 458 μm (see Table 3), the porosity is 11.73%, and there is a large-sized hole inside the
As can be seen from the figure, the spray distance is 120 mm, the maximum thickness of the coating is deposited, the coating thickness is about 458 μm (see Table 3), a porosity of 11.73%, and there is a large size pores inside the coating
As can be seen from the figure, the spray distance is 120 mm, the maximum thickness of the coating is deposited, the coating thickness is about 458 μm (see Table 3), a porosity of 11.73%, and there is a large size pores inside the coating

When the spraying distance is 110 mm and 130 mm, the coating is relatively dense, and the porosity is 3.91% and 4.04%, respectively.
When the spraying distance is 110 mm and 130 mm, the coating is relatively dense, and the porosity is 3.91% and 4.04%, respectively

When the spraying distance is 110 mm and 130 mm, a relatively dense coating, a porosity of 3.91% and 4.04%, respectively.
When the spraying distance is 110 mm, the deposition efficiency of the coating is lower than that of 130 mm, and the deposition thicknesses are 275 mm and 361 mm, respectively, and the deposition thicknesses of both meet the author's design requirements.
When the spraying distance is 110 mm, the deposition efficiency of the coating is lower than that of 130 mm, and the deposition thicknesses are 275 mm and 361 mm, respectively, and the deposition thicknesses of both meet the author's design requirements.
When the spraying distance is 110 mm, the deposition efficiency of the coating is lower than that of 130 mm, and the deposition thicknesses are 275 mm and 361 mm, respectively, and the deposition thicknesses of both meet the author's design requirements
When the spraying distance is 110 mm, the coating deposition efficiency of less than 130 mm, is deposited to respective thicknesses of 275 mm and 361 mm, are in line with both deposited to a thickness of the design requirements.When the spraying distance is 110 mm, the coating deposition efficiency of less than 130 mm, is deposited to respective thicknesses of 275 mm and 361 mm, are in line with both deposited to a thickness of the design requirements
When the spraying distance is 140 mm, the coating deposition efficiency is the worst, the coating thickness is about 220 mm and the porosity is also large.When the sprayi
When the spraying distance is 140 mm, the coating deposition efficiency is the worst, the coating thickness is about 220 mm and the porosity is also large.
When the spraying distance is 140 mm, the coating deposition efficiency is the worst, from about 220 mm thickness and porosity of the coating is larger.
When the spraying distance is 140 mm, the coating deposition efficiency is the worst, from about 220 mm thickness and porosity of the coating is larger.


By measuring the porosity at different positions of the four coatings, it can be seen that the porosity near the surface of the coating is larger than the porosity inside the coating