| Abstract Scope |
The ability to integrate heat pipes into monolithic structures using additive manufacturing is a promising avenue for advanced thermal management. A monolithic heat pipe structure is a geometry where the part, heat pipe walls, and the fluid wicking structure are all fabricated as one integrated component. In this work we examine the use of the laser powder bed fusion process for creating wicking structures out of Inconel 718 for use in heat pipes. Specifically, three different approaches are studied for their fluid wicking performance: structured, rastered and sintered, which use design and process strategies for creating porous wicks. The wicks are evaluated based on their porosity, manufacturability, and fluid rate of rise, using X-ray tomography, SEM, mass measurements, IR thermal imaging and CFD simulations for the investigation. Results include a discussion of the advantages and disadvantages of the three strategies as well as on their potential for future system integration. |