What can directed energy deposition (DED) systems use to prevent metal powders from oxidizing?

Directed energy deposition (DED) systems utilize inert shielding gas to prevent metal powders from oxidizing during the additive manufacturing process. Inert gases, such as argon or nitrogen, create a protective environment around the material being deposited. This atmosphere prevents the reactive oxygen from coming into contact with the metal powders and the molten metal during the deposition process, which is crucial for maintaining the mechanical properties and quality of the final part.

Maintaining a controlled atmosphere helps to avoid oxidation reactions that can degrade the material and compromise the integrity of the finished product. Shielding the process with inert gas is a common practice in many metal processing applications, particularly when dealing with reactive materials.

While high temperatures, vacuum systems, and liquid nitrogen can also be associated with various metalworking and additive manufacturing techniques, they do not specifically address the prevention of oxidation in the same direct and effective manner that inert shielding gas does for DED systems.