Study of Mechanical Properties of Ceramics Al2O3 nanoSiC with Employ Hot Press in Various Temperatures Sinter

Alumina (Al2O3) with having excellent properties such as high hardness has disadvantages such as low fracture toughness and various types of additives such as nanoscale silicon carbide (SiC) powder can added to Al2O3 to improve physical and mechanical properties In this study، silicon carbide nanoparticles containing 2 5، 5، 7 5، 10 and 15 volumetric were added to Al2O3 powder containing 0 05 weight magnesium oxide (MgO) nanoparticles. The combined powder was ball milled in isopropanol using high purity tungsten carbide (WC) balls in a planetary ball mill The milled mixtures were dried and compacted by the cold press Sintering of the powder compacts was carried out the graphite furnace in argon atmosphere and employ hot press method at 1600، 1650، 1700 and 1750°C temperatures and constant pressure. The effect of raw materials composition and temperature of synthesis to the physical and mechanical properties and the results indicate significant increases in mechanical properties with addition nanoscale SiC powder.