Enhancement of fracture toughness in nanostructured ...
ball-milled under argon atmosphere for 11 h with a Certiprep Spex 8000-D mixer mill with tungsten carbide~WC! balls and vials. Experiments show that the participation of micron-size diamond particles in the ball-milling process greatly speeds up particle size-reduction and amorphous transforma-tion of crystalline silicon. The Raman spectroscopy and