Atas, Mehmet SahinAk, Oguzhan2026-04-102026-04-1020261059-94951544-1024https://hdl.handle.net/20.500.13091/13167https://doi.org/10.1007/s11665-026-13765-7The mechanical, thermal, and electrical characteristics of B4C-10SiC composites with varying concentrations of Er2O3 added by flash sintering were examined in this work. The initial current transition temperature, the temperature at which the current transition rate begins, and the maximum current temperature were analyzed in detail. With the addition of Er2O3, the maximum current transition temperature decreased from 613 to 545 degrees C, accelerating the sintering mechanism. XRD analyses revealed that phase formation was limited to low Er2O3 concentrations, while crystallization increased at higher concentrations. SEM images showed that 1 wt.% Er2O3 provided the most homogeneous microstructure and enhanced densification. Hardness analyses indicated that 3 wt.% Er2O3 achieved the highest hardness of 2827.2 HV. Although the hardness increased with 3 wt.% Er2O3, phase separations and microstructural irregularities were observed. The results demonstrated that the optimum Er2O3 content is 1 wt.%, which optimizes the sintering mechanism and improves mechanical properties. Excessive Er2O3 addition was found to disrupt microstructural homogeneity, negatively affecting material properties. In addition, Thermo-Calc software was utilized to construct the solidification curve of the B4C-10SiC-3Er(2)O(3) system and to evaluate the B4C-SiC phase diagram, providing thermodynamic insights into the phase evolution. Ultimately, multicomponent carbide and oxide composites can be consolidated concomitantly via flash sintering which makes this study novel.eninfo:eu-repo/semantics/closedAccessEr2o3Boron Carbide Ceramic MaterialsSICFlash SinteringArticle10.1007/s11665-026-13765-7