|
This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Microinhomogeneity of the structure of nanocrystalline niobium and vanadium carbides
A. S. Kurlova, V. S. Kuznetsovbc, I. A. Bobrikovc, A. M. Balagurovbc, A. I. Guseva, A. A. Rempela a Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
b Moscow State University, Moscow, Russia
c Joint Institute for Nuclear Research, Dubna, Russia
Abstract:
The evolution of the microstructure of nonstoichiometric niobium carbides NbC$_y$ ($y=0.77, 0.84, 0.96$) and vanadium carbide V$_8$C$_7$ subjected to high-energy milling has been studied by the time-of-flight neutron diffraction method. It has been found that milled nanocrystalline powders have microinhomogeneous structure: two fractions with different sizes of particles have been identified in them. The content of the nanofraction is more than $90$ wt $\%$; the size of particles of this fraction varies from $90$ to $250$ Å, depending on the composition of the initial carbide and the duration of milling. The size of particles of the second fraction is more than $2000$ Å. Anisotropic deformation distortions have been revealed. The mean size of coherent scattering regions and microstrains in nanocrystallites have been estimated.
Received: 02.07.2018 Revised: 18.07.2018
Citation:
A. S. Kurlov, V. S. Kuznetsov, I. A. Bobrikov, A. M. Balagurov, A. I. Gusev, A. A. Rempel, “Microinhomogeneity of the structure of nanocrystalline niobium and vanadium carbides”, Pis'ma v Zh. Èksper. Teoret. Fiz., 108:4 (2018), 259–266; JETP Letters, 108:4 (2018), 253–259
Linking options:
https://www.mathnet.ru/eng/jetpl5680 https://www.mathnet.ru/eng/jetpl/v108/i4/p259
|
Statistics & downloads: |
Abstract page: | 151 | Full-text PDF : | 20 | References: | 11 |
|