Fabrication of Dense Nanostructured Silicon Carbide Ceramics through Two‐Step Sintering

SiC powder compacts were prepared with Al 2 O 3 , Y 2 O 3 , and CaO powders. By two‐step sintering, fully dense nanostructured SiC ceramics with a grain sizes of ∼40 nm were obtained. The grain size–density trajectories are compared with those of conventional sintering processes.