Figure 1
From: Reactive laser interference patterning on titanium and zinc in high pressure CO2
FESEM micrographs for DLIP on titanium in scCO2 (a–c) and liquid CO2 (d–f) at 100 bar pressure. Presence of ordered donut/ring pattern was observed for both environments, with only slight difference. Whereas in scCO2, the donut pattern seemed smooth, in case of liquid CO2, the donut pattern consisted of melt deposits on top of the donut rings that were sometimes spherical. (g) Tilt-view FESEM micrograph revealed donut rings formed by DLIP in scCO2 protrude out of the target plane and contain a crevice in the centre. Atomic force microscopy (AFM) image showing topographical (g) 2D and (h) 3D images of donut ring pattern on titanium.
