Метод обробки даних рентгенівської дифракції для багатофазних матеріалів з низьким вмістом фаз
| Autor: | S. A. Chikolovets, I.V. Zhyganiuk, S. V. Gabielkov, P. E. Parkhomchuk, V. G. Kudlai, A. D. Scorbun |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
статистичнi методи аналiзу Analytical chemistry General Physics and Astronomy FOS: Physical sciences Applied Physics (physics.app-ph) 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences X-ray phase and quantitative analysis рентгенiвськi лiнiї Phase (matter) кристалiчнi фази тест перестановок crystalline phases statistical methods of analysis кварц Data processing Condensed Matter - Materials Science Materials Science (cond-mat.mtrl-sci) Physics - Applied Physics quartz 0104 chemical sciences лавоподiбнi паливовмiснi матерiали computer statistics рентгенiвський фазовий та кiлькiсний аналiз X-ray lines комп’ютерна статистика lava-like fuel-containing materials X-ray crystallography permutation test |
| Zdroj: | Ukrainian Journal of Physics; Vol. 64 No. 9 (2019); 870 Український фізичний журнал; Том 64 № 9 (2019); 870 |
| ISSN: | 2071-0194 2071-0186 |
| DOI: | 10.15407/ujpe64.9 |
| Popis: | Amorphous, glass, and glass-ceramic materials practically always include a significant number (more than eight) of crystalline phases, with the contents of the latter ranging from a few wt.% to several hundredths or tenths of wt.%. The study of such materials using the method of X-ray phase analysis faces difficulties, when determining the phase structure. In this work, we will develop a method for the analysis of the diffraction patterns of such materials, when diffraction patterns include X-ray lines, whose intensities are at the noise level. The identification of lines is based on the search for correlations between the experimental and test lines and the verification of the coincidence making use of statistical methods (computer statistics). The method is tested on the specimens of a-quartz, which are often used as standard ones, and applied to analyze lava-like fuel-containing materials from the destroyed Chornobyl NPP Unit 4. It is shown that the developed technique allows X-ray lines to be identified, if the contents of separate phases is not less than 0.1 wt.%. The method also significantly enhances a capability to determine the phase contents quantitatively on the basis of lines with low intensities. 9 pages, 7 figures |
| Databáze: | OpenAIRE |
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