Studying Ultradisperse Diamond Structure within Explosively Synthesized Samples via X-Ray Techniques

15th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Sharkov, M.D.^1 ; Boiko, M.E.^1 ; Ivashevskaya, S.N.^2 ; Belyakova, N.S.^3

Ioffe Physico-Technical Institute of the RAS, 26 Politekhnicheskaya Ul., St.-Petersburg, Russia^1

Geology Institute, Karelian Research Center of the RAS, 11 Pushkinskaya Ul., Petrozavodsk, Russia^2

St. Petersburg Polytechnical State University, 29 Politekhnicheskaya Ul., St.-Petersburg, Russia^3

关键词: Diamond grains;    Fourier-filtering;    Interplanar distance;    Structure component;    Treatment techniques;    Ultra-disperse diamonds;    X-ray techniques;    Xrd (x ray diffraction);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/461/1/012020/pdf
DOI  :  10.1088/1742-6596/461/1/012020

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

XRD (X-Ray Diffraction) and SAXS (Small-Angle X-Ray Scattering) data have been measured for a pair of samples produced with the help of explosives. XRD peaks have shown the both samples to contain crystal diamond components as well as graphite ones. Basing on SAXS analysis, possible presence of grains with radii up to 30-50 nm within all the samples has been shown. Structure components with fractal dimension between 1 and 2 in the sample have been detected, this fact being in agreement with the assumption of diamond grain coating similarity to onion shells. In order to broad rocking curves analysis, the standard SAXS treatment technique has been complemented by a Fourier filtering procedure. For the sample #1, rocking curve components corresponding to individual interplanar distances with magnitudes from 5 nm up to 15 nm have been separated. A hypothesis relating these values to the distances between concentric onion-like shells of diamond grains has been formulated.