20.500.12556/RUL-132410 Comparative characterization of different cutting strategies for the sintered ZnO electroceramics Sintered zinc oxide (ZnO) ceramic is a fragile and difficult-to-cut material, so finishing operations demand handling cautious and accurate surface tolerances by polishing, grinding, or machining. The conventional machining methods based on grinding and lapping offer limited productivity and high scalability; therefore, their incapacity to prepare tight tolerances usually end up with uncontrolled edge chipping and rough surfaces in the final products. This study investigates microstructural features with surface roughness in a comparative mode for conventional milling and abrasive waterjet cutting (AWJ). Edge topography and roughness maps are presented in this study to weigh the benefits of AWJ cutting over the conventional material removal methods by altering the feed rates. The porosity analysis implies that the differences during the multi-channel processing of varistors, which tend to alter the microstructure, should in turn exhibit a different response during cutting. The surface roughness, edge contours, and porosity generation due to shear forces are interpreted with the help of 3D optical and electron microscopy. The results demonstrate that the surface microstructure can have a noteworthy impact on the machining/cutting characteristics and functionality, and in addition, mechanical properties of ZnO varistors can fluctuate with non-uniform microstructures. ZnO varistors machining milling abrasive waterjet cutting porosity electron microscopy edge radius (r) profilometry surface roughness (Sa S10Z) topography analysis ZnO varistorji frezanje rezanje z vodnim curkom true false true Angleški jezik Slovenski jezik Članek v reviji 2021-10-25 10:31:11 2021-10-25 10:31:16 2022-09-12 04:12:20 0000-00-00 00:00:00 2021 0 0 Str. 1-15 iss. 20 Vol. 11 Oct. 2021 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 621.941(045) 2076-3417 10.3390/app11209410 80372739 RAZ_Dugar_Jaka_2021.pdf RAZ_Dugar_Jaka_2021.pdf 1 053FDF974E051409D3143320D56039D9 e3fe5fd0b978728d8723b32d9888efbf18b4a5f7f00d75da53a9253b863d64a1 82095cdd-356e-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=150042 https://www.mdpi.com/2076-3417/11/20/9410 1 e4cb19a6-356d-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=150041 Fakulteta za strojništvo 0 0 0