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Pó de alfa carbeto de silício (alfa-SiC) foi cominuído em moinho planetário durante os períodos de tempo de ½, 2, 4 e 6 h. A velocidade de rotação foi de 300 rpm, o meio de moagem foi álcool isopropílico e os corpos moedores foram esferas de zircônia estabilizada com céria. Os pós cominuídos foram caracterizados quanto ao tamanho e distribuição de tamanho de partícula, a composição química, as fases cristalinas e a morfologia. Observou-se uma grande redução no tamanho de partículas, que passaram de micrométricas para submicrométricas e até nanométricas, alteração da distribuição das mesmas de bimodal para unimodal, e a geração de aditivação secundária causada pelo meio de moagem. Alpha silicon carbide (alpha-SiC) powder was comminuted in planetary mill during ½, 2, 4 and 6 h. The rotation speed was 300 rpm, the medium of milling was isopropyl alcohol and the grinding bodies were spheres of ceria-stabilized zirconia. The milling powders were characterized concerning the size and particle size distribution, the chemical composition, the crystalline phases, and morphology. A large reduction of the particle size, that had changed from micrometrics to submicrometrics and even nanometrics, a change of their distribution from bimodal to unimodal, and the generation of secondary aditivation caused by medium of milling were observed

Moagem de pós de carbeto de silício em moinho planetário