Characteristics of RP/M.
|Technology of manufacturing||FGM used||Process||Advantage1 and disadvantage2|
|Powder + binder +3-DP||Plaster powder + multiple binding fluids||Local composition control (LCC) is accompanied by a print head with several jets, each depositing binders and/or slurries of a material. The material composition is on the scale of the binder droplets 100 μm||
|Powder injection + laser melting||Stainless steel AISI 316 L + stellite grade 12||Powders are injected on working zone by coaxial nozzles, controlled by CNC table, and then molten by 5 kW Nd: YAG laser or CO2 laser. Layer thickness is 30–50 μm.||
|Powder + selective laser sintering||Hydroxyapatite and polymer composite||Hydroxyapatite and polyethylene are incorporated into an FGM-based matrix for bone implants. The average size of internal pores is 60–68 μm. The laser is a 10-W CO2||
|Filament + fused deposition modeling||Ceramic + polymer composites||Ceramic and polymer materials are fused and deposited. The properties of the composites can be tailored by changing the connectivity of the phases||
|Powder + selective laser sintering||Poly(vinyl alcohol) PVA + hydroxyapatite||PLA and hydroxyapatite are mixed and sintered by SLS RP to fabricate tissue scaffolds. Layer thickness is 50 μm||
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