Structure and Properties of Spark Plasma Sintered SiC Ceramics with Oxide Additives
Dauren Zhambakin,
Almira Zhilkashinova,
Madi Abilev,
Leszek Łatka,
Alexandr Pavlov,
Bauyrzhan Tuyakbaev,
Assel Zhilkashinova
Affiliations
Dauren Zhambakin
Department of Analytical, Colloid Chemistry and Technology of Rare Elements, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty 050040, Kazakhstan
Almira Zhilkashinova
National Research Laboratory for Collective Use, Sarsen Amanzholov East Kazakhstan University, 34 Tridtsatoy Gvardeiskoy Divizii Street, Ust-Kamenogorsk 070002, Kazakhstan
Madi Abilev
Department of Analytical, Colloid Chemistry and Technology of Rare Elements, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty 050040, Kazakhstan
Leszek Łatka
Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 5 Lukasiewicza Street, 50-371 Wroclaw, Poland
Alexandr Pavlov
National Research Laboratory for Collective Use, Sarsen Amanzholov East Kazakhstan University, 34 Tridtsatoy Gvardeiskoy Divizii Street, Ust-Kamenogorsk 070002, Kazakhstan
Bauyrzhan Tuyakbaev
National Research Laboratory for Collective Use, Sarsen Amanzholov East Kazakhstan University, 34 Tridtsatoy Gvardeiskoy Divizii Street, Ust-Kamenogorsk 070002, Kazakhstan
Assel Zhilkashinova
National Research Laboratory for Collective Use, Sarsen Amanzholov East Kazakhstan University, 34 Tridtsatoy Gvardeiskoy Divizii Street, Ust-Kamenogorsk 070002, Kazakhstan
This article describes spark plasma sintering of ceramics based on silicon carbide with nanoadditives, as follows: MnOnano 5.5 wt. % + Al2O3nano 2.0 wt. % + SiCnm (37–57 wt. %) + SiCµm (31–51 wt. %) + SiO2µm 4.5 wt. %. Sintering was carried out at 2000 °C. The diffraction pattern of the analyzed sample showed the presence of silicon carbide with a hexagonal crystal lattice. Residual amounts of rhombohedral SiC, α-Fe, and a solid solution of silicon in iron were also found. The method of thermogravimetric analysis established the change in mass, heat flow, temperature of the samples, and the change in the partial pressures of gases during the experiment. Samples obtained by SPS show a higher density of the material at the level of 3.3 g/cm3, average mechanical strength of 454 MPa, and microhardness of 35 GPa, compared with samples obtained by liquid-phase sintering. The SPS method also made it possible to obtain materials with a higher density (by 8%) and practically no significant crystal growth compared to samples obtained by liquid phase sintering. The results of the study facilitate the achievement of a combination of new approaches to the design of compositions and the technology of manufacturing SiC ceramics, which significantly expands their areas of application.
