Fig. 1
From: Porous carbons with complex 3D geometries via selective laser sintering of whey powder
Key factors of whey powder for its selective laser sintering (SLS); (a) schematics of the sintering process with micrographs showing the rounded shape of the fresh whey powder and the bridging of individual whey particles after laser sintering; (b) TA, DTA and DSC of whey powder (W1) in air, with the SLS processing temperature window highlighted; (c) densities (real, bulk and tap densities) and flowability properties (Hausner ratio and Carr index) of the different whey samples (W1-W5), with SLSed cubes obtained from all of them using similar processing conditions (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 = 250 mm/s).
