20.500.12556/RUL-158978 The microstructural reconstruction of variously sintered Ni-SDC cermets using focused ion beam scanning electron microscopy nanotomography This work focuses in-depth on the quantitative relationships between primary first-order microstructural parameters (i.e., volume fractions of various phases and particle size distribution) with the more complex second-order topological features (i.e., connectivity of phases, three-phase boundary length (TPB$_L$), interfacial areas, or tortuosity). As a suitable model material, a cermet nickel/samaria-doped ceria (Ni-SDC) is used as an anode in a solid oxide fuel cell (SOFC). A microstructure description of nano-sized Ni-SDC cermets, fabricated at various sintering conditions from 1100 °C to 1400 °C, was performed using FIB-SEM nanotomography. The samples were serially sectioned employing a fully automated slicing procedure with active drift correction algorithms and an auto-focusing routine to obtain a series of low-loss BSE images. Advanced image processing algorithms were developed and applied directly to image data volume. The microstructural–topological relationships are crucial for the microstructure optimisation and, thus, the improvement of the corresponding electrode performance. Since all grains of individual phases (Ni, SDC, or pores) did not percolate, special attention was given to the visualisation of the so-called active TPB$_L$. Based on the determined microstructure characteristics of the prepared Ni-SDC cermets, including simulations of gas flow and pressure drop, thermal treatment at 1200 °C was recognised as the most appropriate sintering temperature. solide oxide fuel cells cermets focused ion beam scanning electron microscopy microstructure morphology gorivne celice s trdnim elektrolitom kermeti vrstični elektronski mikroskop s tehnologijo fokusiranega ionskega sklopa mikrostruktura morfologija true false true Angleški jezik Slovenski jezik Članek v reviji 2024-06-26 09:22:34 2024-06-26 09:22:36 2024-07-07 03:27:20 0000-00-00 00:00:00 2024 0 0 19 str. iss. 13, [art.] 3068 Vol. 17 21 Jun. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1:621.352 1996-1944 10.3390/ma17133068 199842819 RAZ_Kapun_Gregor_2024.pdf RAZ_Kapun_Gregor_2024.pdf 1 A3721FE37F6726434EE7B524AF6C8478 a1d08720c060b563f7571df8901c086468355b2ad56cb7fdbc4e9901dcb546e0 a4322a1f-338d-11ef-8fa5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186722 https://www.mdpi.com/1996-1944/17/13/3068 1 dd4be035-338c-11ef-8fa5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186719 Fakulteta za kemijo in kemijsko tehnologijo Naravoslovnotehniška fakulteta 0 0 0