Abstract
The evolution of the microstructure of nonstoichiometric niobium carbides NbCy (y = 0.77, 0.84, 0.96) and vanadium carbide V8C7 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 A, 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 A. Anisotropic deformation distortions have been revealed. The mean size of coherent scattering regions and microstrains in nanocrystallites have been estimated.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
