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EX.3. Smali Angle Scattering

SAXS image of nanocrystalline SiC measured at BI, HASYLAB, DESY


Smali Angle X-ray Scattering (SAXS) and Ultra-SAXS (USAXS) experiments for series of nanocrystalline SiC and diamond powders withgrain sizes ranging from 2 to 20 nm were perfonned in wide rangę of scattering vector values from 0,001 to 1 A'1. Samples were formed in pi lis in non-hydrostatic conditions at pressures ranging from 0.025 to 6.25 GPa.

It was found that for seven powders examined, all diamond and most of SiC powders have fractal microstructure. Fractal dimensions strongly depend on pressure applied during sample preparation for SiC, less in case of diamond.


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