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Attraction Force Estimations of Al 2 O 3 Particle Agglomerations in the Melt
Author(s) -
Xuan Changji,
Karasev Andrey V.,
Jönsson Pär Göran,
Nakajima Keiji
Publication year - 2017
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201600090
Subject(s) - van der waals force , wetting , hamaker constant , materials science , sintering , economies of agglomeration , surface tension , diffusion , phase (matter) , particle (ecology) , thermodynamics , chemistry , van der waals radius , metallurgy , composite material , chemical engineering , physics , molecule , organic chemistry , engineering , oceanography , geology
The influence of the van der Waals force, wettability of Al 2 O 3 by liquid iron, and solid phase sintering on the Al 2 O 3 agglomeration is studied. By using Fowkes module, the function of Hamaker constant of liquid iron changes with the surface tension of liquid iron, γ Fe (l) , at temperature 1873 K is created. For the agglomeration behavior of Al 2 O 3 in the deoxidation case, the difference between the cavity bridge force and van der Waals force is smaller than seven times. It means that even though van der Waals force is weaker, it still can attract the inclusions to some extent. In the reoxidation case, the influence of the cavity bridge force decreases, and becomes similar to that of the liquid‐capillary force. In this case, both attraction forces play important roles in the Al 2 O 3 cluster formation. Moreover, for the solid phase sintering, the apparent self‐diffusion coefficient, D v , of Al 2 O 3 at temperature 1873 K in liquid Fe–10 mass%Ni alloy is found to have a value of 1.95 × 10 −14 m 2 s −1 .