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Nanometric SiC powder with a stacking disordered structure(heretofore referred as SD-SiC)was synthesized by high-energy ball milling of elemental powders of Si and C under Ar atmosphere.The starting materials were powders of Si and C.Stoichiometric 1:1 mixtures of the two elements were alloyed in a high-energy planetary ball mill for 24 h,using Si3N4 vial and balls.