20.500.12556/DiRROS-30090 Rapid radiation sintering of additively manufactured large-sized alumina tetrahedrons Rapid radiation techniques, such as pressureless spark plasma sintering (pSPS) and ultra-fast high-temperature sintering (UHS), have proven effective in achieving rapid densification of ceramics, including additively manufactured components. However, sintered component sizes tend to be small, disk-shaped or having thin-strutted geometries. Here, fused filament fabrication (FFF) of a commercial filament was used for manufacturing complex-shaped and large-sized alumina tetrahedra with edge thickness of 5 mm, varying the edge size (15‒40 mm). The aim was to investigate the effect of heating rate (33‒300°C/min) and tetrahedron size on the pSPS outcome. The pSPS reductive environment discoloured the tetrahedra, but were all successfully rapidly sintered to full density irrespective of their size and heating rate employed. The evolved thermal gradient contributed to differential, anisotropic densification related shrinkage, microstructure and mechanical properties specific to tetrahedra` edge position, i.e., core versus shell and base versus lateral, also triggering cracking of the largest tetrahedra. additive manufacturing fused filament fabrication pressureless spark plasma sintering napredna funkcionalna keramika izdelovanje taljeni filamenti breztlačno sintranje plazma true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Authors. Neznano 2026-06-15 12:02:47 2026-06-15 12:02:47 2026-06-16 03:54:48 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 18. 5. 2026; str. 1-26 Vol. , article no. 100981 May 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-01-15 2026-05-13 2026-05-14 621.7+621.9 2666-5395 10.1016/j.oceram.2026.100981 278483971 https://www.sciencedirect.com/science/article/pii/S2666539526000775 1 5d83bdf7-68a1-11f1-aebd-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45423 RAZ_Ivekovic_Aljaz_2026.pdf RAZ_Ivekovic_Aljaz_2026.pdf 1 213B73AD1FDFE25136D13084676E6C7F 6c0eddcabe7fd2f49cdb8a781de4b7005651383d39d8726bc676d9db61e10092 f6a9b8f1-68a1-11f1-aebd-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45425 Institut Jožef Stefan 0 0 0