20.500.12556/RUL-179446 Performance evaluation of wick-free vapor chamber featuring hierarchical laser engineered surfaces Thin vapor chambers are attractive for compact electronics but become difficult to operate reliably as the vapor space approaches the millimeter scale, especially when classical wick structures are omitted. This work investigates how coupled evaporator and condenser wettability governs the performance of a 1 mm thick wick-free vapor chamber. Six configurations are evaluated by combining three condenser surface states (reference, superhydrophilic, superhydrophobic) with either a reference copper evaporator or a laser-textured superhydrophilic evaporator. Thermal performance is assessed from 10 to 40 W using the evaporator–condenser temperature difference and overall thermal resistance. The results show that the preferred condenser wettability depends on evaporator capability. With the reference evaporator, the lowest thermal resistance at 40 W is achieved with reference and superhydrophobic condensers (1.21 and 1.18 K/W). With the laser-textured evaporator, a superhydrophilic condenser provides the best performance, and the SHPI–SHPI configuration reaches 0.77 K/W at 40 W. These findings provide practical guidance for designing ultrathin wick-free vapor chambers through coordinated interface wettability selection. vapor chambers thermal performance nanosecond laser texturing surface wettability thermal resistance heat transfer enhancement parne komore izboljšanje prenosa toplote nanosekundno lasersko teksturiranje omočljivost površine toplotna upornost toplotna učinkovitost true false true Angleški jezik Slovenski jezik Članek v reviji 2026-02-13 14:57:10 2026-02-13 14:57:16 2026-02-14 04:24:45 0000-00-00 00:00:00 2026 0 0 21 str. issue 4, art. 1795 Vol. 16 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.1:536.2 2076-3417 10.3390/app16041795 268459523 Golobic,_Hadzic..._Performance_evaluation....pdf Golobic,_Hadzic..._Performance_evaluation....pdf 1 24F00ACD7A8D95C685861D24C2258B47 1cb40d5718d3df234d56051d4b18bbd60ee657128acb9196b492e9c0093e0341 03049d19-08e4-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=227973 https://www.mdpi.com/2076-3417/16/4/1795 1 c0045656-08e3-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=227972 Fakulteta za strojništvo 0 0 0