Metalfilled

Metalfilled is a class of composite materials in which metal powder is dispersed within a binding matrix. In additive manufacturing, metalfilled filaments or resins contain metal particles—such as bronze, copper, aluminum, stainless steel, or other alloys—embedded in a polymer binder. The presence of metal imparts a metallic appearance and higher density to the printed object, while the binder enables processing with standard equipment.

In 3D printing, metalfilled materials are designed for desktop printers that operate on fused deposition modeling or inkjet-based systems. The metal content is sufficient to resemble metal in weight and sheen but typically remains a polymer-binder composite until post-processing. Filaments can be abrasive to nozzles and may require specific temperatures and feed rates.

Post-processing methods vary: some workflows debind and sinter the part in a furnace to fuse metal particles, producing near-net shape metal components; others rely on surface polishing or electroplating to enhance appearance. However, most metalfilled parts do not achieve full bulk metal properties without such processing, and mechanical properties depend on the metal–binder ratio and the post-treatment.

Applications include artistic and decorative objects, jewelry prototypes, and demonstration pieces, as well as functional parts where the look or weight of metal is desired. Plating or other finishes can further improve surface quality or conductivity. Safety considerations include dust from metal powders and fumes during processing.

See also: metal-filled materials, conductive filaments, metal additive manufacturing.