Silicon Carbide Particle Size Effects in Al 2O 3 SiC Nanocomposites

Al 2O 3 SiC composite powders including different size SiC particles were prepared by the heterogeneous precipitation method The TEM morphology of Al 2O 3 coating SiC particles was observed Dense bodies were obtained by hot pressing SEM observation showed, the Al 2O 3 matrix grain size became smaller with the addition of smaller size SiC particles, but the reduction trend was not as strong as Zener expected The mechanical properties of nanocomposites increased when the size of SiC inclusion became smaller, which was relative to smaller weakening effect of SiC particles on matrix grain and smaller matrix grain size