Open AccessОпределяющее влияние периметра островков на фазовые равновесия в системе графен-металл с растворенным в объеме углеродом
Author(s) -
Е.В. Рутьков,
Н.Р. Галль
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.03.49020.615
Subject(s) - interphase , graphene , coalescence (physics) , thermodynamic equilibrium , metal , volume (thermodynamics) , materials science , hysteresis , thermodynamics , condensed matter physics , nanotechnology , physics , metallurgy , genetics , astrobiology , biology
It was found that an insignificant increase of the concentration of carbon atoms in the volume of metal (~2–3%) leads to a significant increase (by 3–4 times) of the total equilibrium relative area of the graphene islands on the metal’s surface. This effect is observed at high temperatures of 1800–1900 K at diffusive equilibrium between the volume and surface of a sample. This effect is related to the determining role of the perimeter of 2D graphene islands that determines the equilibrium interphase flows of carbon. Islands characterized by a drastically different area but similar total perimeters formed due to coalescence can be found on the surface. This factor also explains the temperature hysteresis of thermodynamic equilibrium processes observed in metal–graphene islands’ processes.