Open AccessАномалии упругих и неупругих свойств наногранулированных композиционных материалов Co-=SUB=-x-=/SUB=-(CaF-=SUB=-2-=/SUB=-)-=SUB=-100-x-=/SUB=-
Author(s) -
D. P. Tarasov
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2019.06.47638.245-18
Subject(s) - materials science , maxima , sputtering , metal , analytical chemistry (journal) , diffusion , phase (matter) , crystallography , chemistry , thermodynamics , thin film , metallurgy , nanotechnology , physics , art , organic chemistry , chromatography , performance art , art history
Elastic ( G ) and inelastic ( Q ^–1) properties of the Co_ x (CaF_2)_100 –_ x ( x = 41–84 at %) nanocomposites fabricated with the aid of ion-beam sputtering are studied in a temperature interval of 170–750 K. Maximum internal friction related to hopping of Co atoms inside metal granules is revealed at a temperature of 227 K. It is shown that the maxima increase with increasing concentration of metal phase. A noticeable increase in dependence Q ^–1( T ) at a temperature of greater than 675 K is caused by diffusion of vacancies in the Co granules under geometrical confinements.