Abstract
An x-ray powder diffraction method was used to study the reaction between carbonnanotubes (CNT) and silicon (Si) nanosize powder at 2 GPa and temperatures varying from1273 to 1370 K with different sintering times. Samples were obtained using thepiston–cylinder system. On the basis of the Avrami–Erofeev model, we foundthe activation energy of silicon carbide (SiC) formation from CNT and Si to be96 ± 30 kJ mol−1. Analysis of x-ray diffraction patterns provided information on the domain sizes andmicrostrain in SiC. Extending the sintering time increased the grain sizes anddecreased the microstrain in SiC, and increasing the temperature resulted in largercrystallites.
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