Challenges for Additive Manufacturing on Psyche
Microgravity
The gravity on Psyche's surface is only 1/10th of the Earth's.
Radiation
Without an atmosphere, the surface of Psyche is exposed to extreme radiation from the Sun and space.
Temperature Flux
In just one of Psyche's four-hour days, the surface can range from -133 to 121 degrees C.
Isolation
At over half a million kilometers from Earth, resupply would be sparse at best.
Microgravity
This project focuses on solving the challenges presented by microgravity, with consideration to the additional challenges presented above. Laser Powder Bed Fusion, a technique for 3D printing metal products, was used as the benchmark. It is the most feasible method to be adapted for additive manufacturing in space.
Schematic
LPBF is a technique used to 3D print metal products by directing a high powered laser at a layer of fine metal particles (powder). Each layer is fused together, one-by-one, until the whole product is realized.
Earth Based Method
Traditional techniques rely on the Earth's gravity to hold metal powder on the print bed.
On Psyche
Since Psyche produces far less gravitational force than Earth, metal powder could easily shake free from the printing surface and compromise the product.
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