Each has its unique differences.
Laser Sintering
Laser Sintering is perfect for materials like Polyamide, Alumide, Aluminum, and Titanium. The printer’s interior is heated until it almost reaches the melting point of your chosen powder, which is then spread out in a fine layer. You can check out here some 3D model projects that are done by different techniques.
A laser beam raises the temperature of the areas that need to be sintered together above the melting point, fusing them together to create your design!
Powder- and binder-based 3D printing
Materials like Steel and High-Detail Stainless Steel also rely on powder but are transformed using a technique that differs slightly from Laser Sintering. A thin layer of powder is rolled out on a platform before a binding agent is placed at specific points, printing a thin layer of your model that can bind to subsequent layers.
It’s worth noting that this technique requires post-processing: Steel and High-Detail Stainless Steel are placed in an oven to fuse, while Steel models are also infused with Bronze for extra strength.
Multi Jet Fusion (MJF)
Like the previous technology, MJF is powder-based but does not use lasers. The powder bed is heated before a fusing agent is jetted onto the particles that need to be fused together, and a detailing agent is jetted around the contours to improve part resolution. While lamps pass over the powder bed’s surface, the jetted material captures the heat and helps distribute it evenly.