Td. Shen et al., SOLID-STATE REACTION IN NANOCRYSTALLINE FE SIC COMPOSITES PREPARED BYMECHANICAL ALLOYING/, Journal of Materials Science, 32(14), 1997, pp. 3835-3839
Different solid-state reactions, i.e. Fe + SiC --> Fe3C + Fe(Si), and
Fe + SiC --> Fe3Si + Fe2Si + C, were found in mechanically alloyed nan
ocrystalline Fe/SiC composites induced by prolonged milling or heat tr
eatment, respectively. The solid-state reaction between nanocrystallin
e iron and SIC upon heating is greatly enhanced when compared with tha
t between bulk iron and SiC. It is believed that the prolonged milling
-induced reaction is related to the changed thermodynamics and kinetic
s while the heat-treatment-induced reaction, completed during a short
time, is attributable to the changed reaction kinetics.