Attraction Force Estimations of Al2O3 Particle Agglomerations in the Melt
Attraction Force Estimations of Al2O3 Particle Agglomerations in the Melt
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DOI：
10.1002/srin.201600090
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发表时间：
2017-02
影响因子：
2.2
通讯作者：
Changji Xuan;A. Karasev;P. Jönsson;K. Nakajima
中科院分区：
文献类型：
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作者：
Changji Xuan;A. Karasev;P. Jönsson;K. Nakajima
研究了范德华力、铁水对Al2O3的润湿性以及固相烧结对Al2O3团聚的影响。利用Fowkes模块，建立了1873 K温度下铁液Hamaker常数随铁液表面张力变化的函数γFe(l)。对于脱氧情况下Al2O3的团聚行为，空桥力与范德华力之差小于7倍。这意味着尽管范德华力较弱，但仍能在一定程度上吸引夹杂物。在再氧化情况下，空腔桥力的影响减小，变得与液体毛细管力的影响相似。在这种情况下，两种吸引力在 Al2O3 团簇的形成中都发挥着重要作用。此外，对于固相烧结，在液态 Fe-10 质量%Ni 合金中，1873 K 温度下 Al2O3 的表观自扩散系数 Dv 值为 1.95 × 10−14 m2 s−1。
The influence of the van der Waals force, wettability of Al2O3 by liquid iron, and solid phase sintering on the Al2O3 agglomeration is studied. By using Fowkes module, the function of Hamaker constant of liquid iron changes with the surface tension of liquid iron, γFe (l), at temperature 1873 K is created. For the agglomeration behavior of Al2O3 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 Al2O3 cluster formation. Moreover, for the solid phase sintering, the apparent self‐diffusion coefficient, Dv, of Al2O3 at temperature 1873 K in liquid Fe–10 mass%Ni alloy is found to have a value of 1.95 × 10−14 m2 s−1.