Abstract: A dry gel was prepared from Al(NO₃)₃·9H₂O, (CH₂)₆N₄ and SiC powder with a particle size of 30 nm via the sol-gel processing. Al₂O₃-SiC ceramic nanocomposites were obtained from the dry gel by means of vacuum heat-pressing technique. X-ray diffraction, scan electron microscopy and hardness experiment were used to analyze the structure, morphology, grain size and hardness of the Al₂O₃-SiC nanosized ceramic composites with different contents of SiC particles sintered at different temperatures.

Key words: sol-gel processing, Al₂O₃-SiC ceramic nanocomposites, sinter