20.500.12556/DiRROS-21454 Liquid-copper infiltration and characterization of additively manufactured W-lattice structures Tungsten-copper (W-Cu) composites have a wide range of engineering applications, from arc-resistant electrodes and high-voltage electrical contacts to heat sinks for integrated circuits and plasma-facing components for fusion reactors. They combine high corrosion and erosion resistance, very good thermal and electrical conductivity, low thermal expansion, with good mechanical properties. However, the fabrication of such materials is limited in terms of shape complexity and the internal distribution of the individual phases. Furthermore, the dissimilar thermo-mechanical properties (melting temperature, thermal conductivity, coefficient of thermal expansion) of the constituent phases impose severe constraints on the fabrication and use of W-Cu composites. To overcome the challenges of component design and enable greater freedom in terms of composition, W-Cu composites were produced by a combination of additive manufacturing and liquid-melt infiltration (LMI). Porous W-lattice structures were manufactured by laser powder-bed fusion (LPBF) followed by infiltration with molten Cu. A series of composites was produced with Cu contents from 3 to 75 vol% and evaluated in terms of thermal, electrical, and mechanical properties. The LPBF-LMI W-Cu composites exhibited comparable thermo-mechanical properties to W-Cu materials manufactured using powder-metallurgical processing, but with an expanded composition range and shape complexity. Lower thermal expansion coefficients (4.5–5.8 × 10−6 K−1) and an improved thermal stability of the Young’s modulus, only a 27–33 GPa decline in the range 27–827 °C, were observed for all the compositions, which was ascribed to the W-phase connectivity in all the W-Cu composites, independent of the volume fraction of Cu. termomechanical properties liquid-metal infiltration laser powder-bed fusion metal-matrix composites termomehanske lastnosti true false true Angleški jezik Slovenski jezik Neznano 2025-02-07 14:11:19 2025-02-07 14:11:19 2025-02-08 03:35:28 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Opis vira z dne 7. 2. 2025; str. 1-11 Vol. 1011, [article no.] 178411 Jan. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 2024-04-22 2024-12-30 2024-12-31 2026-12-31 621.7+621.9 1873-4669 10.1016/j.jallcom.2024.178411 225480451 https://www.sciencedirect.com/science/article/pii/S0925838824049995 1 061840d0-e555-11ef-9f1e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=30597 RAZ_Ivekovic_Aljaz_2025.pdf RAZ_Ivekovic_Aljaz_2025.pdf 1 A3CF4F546858910AF9CC84D423DA84F2 8a6aa9d1cc7bdcd2df4530272888e1f2ec6bbd8866b3217c711cdaf96bc9467a 0ec097dd-e556-11ef-9f1e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=30598 Institut Jožef Stefan 0 0 0