Thermal Spray Coating

Plasma-spray contamination arises during the thermal deposition process, where molten particles adhere unevenly to substrates. This contamination, it manifests as tenacious oxide layers, which exhibit regional variations influenced from substrate geometry. On metals like steel, the deposits persist densely, showing heat-resistant bonds that resist initial laser pulses. Ceramics, by contrast, display fragmented patterns, less adherent yet prone to microcracking under exposure.

Removal challenges emerge distinctly; the contamination adheres stubbornly to ferrous materials, demanding prolonged irradiation to dislodge, while on non-metallics, it disperses more readily but leaves residual roughness. It appears that laser cleaning yields incomplete results on uneven surfaces, where shadows hinder uniform ablation. These behaviors, they highlight the need for tailored wavelengths, as confirmed by surface scans. The process effectively mitigates thermal damage, though adhesion varies regionally.