How selective laser sintering works
In short: Selective laser sintering uses a laser to fuse powdered material into solid parts by scanning cross-sections from a digital description.
1. The process begins with a 3-D digital description of the part, such as from a CAD file or scan data. 2. A laser selectively fuses powdered material by scanning cross-sections on the surface of a powder bed. 3. Powder particles form a micro-melt layer at the surface, resulting in a reduction in viscosity. 4. A concave radial bridge between particles, known as necking, forms due to the material's response to lower its surface energy.
Sources: Wikipedia, “Selective laser sintering (Wikipedia)” (CC BY-SA 4.0). Illustrative, not to scale.
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