Open AccessФормирование нанокристаллов в аморфной фазе многокомпонентных систем
Author(s) -
Г.Е. Абросимова,
А.С. Аронин,
Н.А. Волков
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.07.47850.415
Subject(s) - materials science , nanocrystal , niobium , alloy , transmission electron microscopy , cobalt , crystallization , amorphous solid , copper , electron diffraction , phase (matter) , crystallography , nanostructure , diffraction , analytical chemistry (journal) , metallurgy , chemical engineering , nanotechnology , chemistry , physics , optics , organic chemistry , chromatography , engineering
The effect of the concentration of alloying components on the crystallization of amorphous (Fe_73Si_13B_9)_1 – _ x _– _ y Nb_ x Cu_ y and (Co_70Si_12B_9)_1 – _ x _– _ y Fe_ x Nb_ y alloys has been studied by X-ray diffraction and transmission electron microscopy in a wide composition region. The formation of the bcc structures in both the alloy groups is shown to be substantially dependent on the alloying component concentrations. The bcc phase is found to form in the cobalt-based alloys in the concentration region, where it was not observed before. In the cobalt-based alloys, the bcc phase appears at a niobium concentration higher than 1 at % and the average bcc nanocrystal size varies from 40 nm (at 1 at % Nb) to 14 nm (at 5 at % Nb). In the Fe-based alloys, nanocrystals with the bcc lattice form at the copper concentrations of 0.45–1 at %, and the average nanocrystal size is dependent on the alloy composition and varies in the range 16–24 nm. The causes of the concentration dependence of the formation of nanostructures in these alloys are discussed.