Fig. 2
From: Porous carbons with complex 3D geometries via selective laser sintering of whey powder
Characteristics of the selective laser sintering (SLS) of whey powder; (a) details of a simple model used for the optimisation of the printing parameters of whey powder (see Table 1); all distances are in mm; (b) micrographs of cross-sections of SLSed whey powder showing an almost imperceptible layering effect; distances between the (hardly-visible) layers are approx. 250 μm; (c) artifact test designed for testing the SLS printing precision of whey powder; all distances are in mm; (d) example of a 3D printed artifact test made of whey powder (W5); (e) photographs of the whey powder collected from the printing reservoirs after a conventional print work (3–5 h), and sieved (< 150 μm); the two other photographs correspond to a 3D printed artifact test made of this re-used whey powder. SLS conditions: particle size < 150 μm; bed temp = 80 ºC; surface (printing) temp = 135 ºC; perimeter number = 1; perimeter offset = 75 μm; hatch offset = 75 μm; hatch distance = 75 μm; layer height = 100 μm; printing speed = 100 mm/s.
