Вид документа : Статья из журнала Шифр издания : 54/A 58 Автор(ы) : Gusev A. I., Kurlov A. S., Bel'kova T. D., Bel'kov A. M. Заглавие : Anisotropy of strain distortions in nanopowders of nonstoichiometric vanadium and tantalum carbides Место публикации : International Journal of Refractory Metals and Hard Materials. - 2015. - Vol. 51. - С. 70-80 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): карбид ванадия, , , --лучи рентгеновские--наночастицы--порошки нанокристаллические Аннотация: For the first time, the effect of milling energy and nonstoichiometry of vanadium carbide VC0.875 and tantalum carbide TaCy (0.81 ≤ y ≤ 0.96) on microstrains anisotropy and the particle size of nanocrystalline powders has been studied experimentally by the X-ray diffraction method. A functional dependence of reduced broadening of diffraction reflections on the scattering vector has been obtained, which takes into consideration the contributions from size, strain and inhomogeneity broadenings. The average size of coherent scattering regions and the value of microstrains in crystallites accounting for anisotropy of strain distortions have been estimated. It is shown that allowance for anisotropy of microstrains and inhomogeneity broadening gives more accurate description of the experimental results on diffraction reflection broadening and more accurate determination of the nanoparticle size. Доп.точки доступа: Gusev, A. I.; Гусев Александр Иванович; Kurlov, A. S.; Bel'kova, T. D.; Bel'kov, A. M.