Sintering Atmosphere and Polytype Effects on Porous Silicon Carbide Ceramics
Kultayeva S.M. Zhakipbayev B.Y. Moldamuratov Z.N. Kim H.-S. Akimbayeva N.
September 2025Engineered Science Publisher
ES Materials and Manufacturing
2025#29
This study investigates the effects of sintering atmosphere and polytype on the electrical and thermal conductivities and flexural strength of porous SiC ceramics. The porosity was maintained at approximately 38.2%. The nitrogen sintered porous SiC ceramic fabricated from β-SiC powder exhibited the electrical conductivity of 1.2 × 101 (Ωcm)-1 which was two orders of magnitude higher than that of a porous SiC ceramic fabricated from α-SiC powder (5.0 × 10-1 (Ωcm)-1). The highest thermal conductivity of 19.5 W/mK and flexural strength of 22.0 MPa showed porous SiC ceramics fabricated from α-SiC powder when sintered in argon and nitrogen atmosphere, respectively. The lowest thermal conductivity of 12.0 W/mK and flexural strength of 5.8 MPa porous SiC ceramics fabricated from β-SiC powder when sintered in nitrogen and argon atmospheres, respectively. Electrical conductivity was primarily determined by the incorporation of nitrogen into the SiC crystal lattice, whereas the thermal conductivity and flexural strength mainly dependent on the microstructure of the material.
Electrical property , Mechanical property , Porosity , Silicon carbide , Thermal property
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Department of Science and Innovations, International Educational Corporation, 28 Ryskulbekov Street, Almaty, 050043, Kazakhstan
Department of Science and Innovations, Kazakh Leading Academy of Architecture and Civil Engineering LLP, 28 Ryskulbekov Street, Almaty, 050043, Kazakhstan
Engineering and Technology Hub, Peoples Friendship University named after Academician A. Kuatbekov, 32 Tole Bi Street, Shymkent, 160011, Kazakhstan
Department of Materials Science and Engineering, University of Seoul, Seoul, 02504, South Korea
Department of Chemistry, Institute of Natural Sciences, Kazakh National Woman’s Teacher Training University, Almaty, 700420, Kazakhstan
Department of Science and Innovations
Department of Science and Innovations
Engineering and Technology Hub
Department of Materials Science and Engineering
Department of Chemistry
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