Keywords: tantalum powder, tungsten powder
The term “additive manufacturing” references technologies that grow three-dimensional objects one superfine layer at a time. Each successive layer bonds to the preceding layer of melted or partially melted material. Objects are digitally defined by computer-aided-design (CAD) software that is used to create .stl files that essentially "slice" the object into ultra-thin layers. This information guides the path of a nozzle or print head as it precisely deposits material upon the preceding layer. Or, a laser or electron beam selectively melts or partially melts in a bed of powdered material. As materials cool or are cured, they fuse together to form a three-dimensional object.
The process involve the spreading of the metal powder layer by layer and uses either a laser or electron beam to melt and fuse powder together to create a part. The process repeats until the entire part is created. Loose or unfused powder is removed during post processing and is recycled for the next build.