Material extrusion-based additive manufacturing (EAM) represents one of the seven categories of 3D printing processes, defined by the ISO international standard 17296-2.
In this AM process category, the feedstock materials are mixtures of a polymeric binder (from 40% to 60% by volume) and a fine grain solid powder of metal or ceramic materials.
Similar type of feedstock is also used in the Metal Injection Molding (MIM) and in the Ceramic Injection Molding (CIM) processes.
The extruder pushes the material towards a heated nozzle thanks to The process for creating material extruded metal parts typically involves several stages, transforming them from plastic/metal composites to fully metal parts.
After year 2015, some commercial providers of the technology have started proposing their product, mostly for metal applications, e.g.: