Author(s)

Zviad Kovziridze, Natela Nijharadze, Gulnazi Tabatadze, Teimuraz Cheishvili, Maia Mshvildadze, Nazibrola Kutsiava, Maia Balakhashvili, Nino Dakhvelidze, Salome Gvazava

Institute of Bionanoceramics and Nanocomposite Technology, Technical University of Georgia, Tbilisi, Georgia.

Goal: To obtain SIALON containing composites by reactive sintering method in SiC-B₄C-Si-Al-Al₂O₃ system. Using this method of synthesis, it became possible to obtain composites with different percentages of SIALON. Our task was also to study the phase composition in the SiC-B₄C-Si-Al-Al₂O₃ system. Method: The obtained mass was grounded in an attritor and the consolidated composite was obtained by hot pressing at 1800°C, 40 minutes, delaying at final temperature for 8 min. under 30 MPa pressure. To study the phase composition of the composites, we conducted an X-ray structural analysis on the DRON-3 device, and to study the microstructure, we conducted research on an optical microscope and a raster electron microscope “Nanolab 7” of the company “OPTON”. The values of the electrical parameters of the study composites were calculated on the basis of the obtained “lgp-t” dependence. Result: In SiC-B₄C-Si-Al-Al₂O₃ system we obtained composites with a matrix composed of: β-SIALON, silicon carbide, corundum and nanoparticles of boron nitride. Conclusion: The phase composition of the obtained composite provides high physical-technical and performance properties of these composites. Compression strength—2187 MPA, Bending strength—285 MPa, Thermal expansion coefficient a_20-700-3.8 × 10^-60 C.

Composite, Electron Microscope, Phase Composition, β-SIALON

Kovziridze, Z. , Nijharadze, N. , Tabatadze, G. , Cheishvili, T. , Mshvildadze, M. , Kutsiava, N. , Balakhashvili, M. , Dakhvelidze, N. and Gvazava, S. (2022) Obtaining and Study Smart Composites in the B₄C-SiC-Si-Al-Al₂O₃—Carbon Fiber System. Advances in Materials Physics and Chemistry, 12, 323-337. doi: 10.4236/ampc.2022.1211021.