Designing High-Porosity Porous Structures with Complex Geometries for Enhanced Thermal Conductivity Using Selective Laser Melting and Heat Treatment

Abstract

Rapid advancements in the aerospace industry necessitate the development of unified, lightweight and thermally conductive structures. Integrating complex geometries, including bionic and porous structures, is paramount in thermally conductive structures to attain improved thermal conductivity. The design of two high-porosity porous lattice structures was inspired by pomelo peel structure, using Voronoi parametric design. By combining characteristic elements of two high-porostructuressity porous lattice structures designed, a novel high-porosity porous gradient structure is created. This structure is based on gradient design. Utilizing selective laser melting (SLM), fabrication comprises three . Steady-state thermal characteristics are evaluated via finite element analysis (FEA). The experimental thermal conductivity measurements correlate well with simulation results, validating the sequence of K_L as the highest, followed by D_K_L and then D_L. Heat treatment significantly improves thermal conductivity, enhancing the base material by about 45.6% and porous structured samples by approximately 43.7%.