EFFECT OF EXPLOSION CONDITIONS ON THE STRUCTURE OF DETONATION SOOTS -ULTRADISPERSE DIAMOND AND ONION CARBON

Detonations of a number of pure and composite explosives with the nega tive oxygen balance in a hermetic tank filled with inert gas (N2, Ar) have yielded the diamond containing solid carbonaceous products (soots ). The influence of detonation parameters, namely (a) the inert gas pr essure in the tank decreasing the effective temperature of detonation products, and (b) the composition of explosives determining the detona tion pressure and temperature, on the nature and the yield of detonati on soots have been investigated by TEM, XRD, SAXS, and auger spectrosc opy. The soots contain ultradisperse diamond (UDD, 20-150 angstrom) al ong with amorphous carbon (40-250 angstrom), graphite ribbons (with le ngth less than 200 angstrom), and spheres (20-40 angstrom) made of con centric graphite shells (onion-like carbon, registered only in the exp eriments with low initial inert gas pressure). It was shown that UDD t hermally transformed into onion-like carbon particles. The detonation parameters have been optimized to increase the UDD yield.