A novel experimental approach to determine the absolute grain boundary energy

A novel experimental approach to determine the absolute grain boundary energy
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确定绝对晶界能的新实验方法

DOI:
10.1080/14786435.2012.716167
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发表时间:
2012
影响因子:
1.6
通讯作者:
L. S. Shvindlerman
L. S. Shvindlerman
中科院分区:
材料科学3区
文献类型:
--
作者:
D. A. Molodov;Ch. Günster;G. Gottstein;L. S. Shvindlerman

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分析了铋中的90°⟨112⟩倾斜边界和锌双晶中的边界的形状,这是在高温退火期间发展起来的,当边界由于磁性自由能密度差在边界上迁移时,而边界固定在横向样品表面上。在外部磁场中退火后,铋中的90°⟨112⟩边界变成了分面。这证明了边界能量相对于其倾角具有明显的各向异性。磁性退火后,锌双晶的随机(非倾斜)边界呈现出弯曲形状。通过计算具有最高常数曲率的边界段的曲率,可以估计出Zn为0.27和0.41 J m−2的不同倾斜边界段的能量上限。
The shape of a 90° ⟨112⟩ tilt boundary in bismuth and a boundary in zinc bicrystals was analyzed, which had developed during annealing at elevated temperatures when the boundary had migrated due to the magnetic free energy density difference across the boundary while the boundary was fixed on the lateral sample surfaces. After annealing in an external magnetic field the 90°⟨112⟩ boundary in bismuth became faceted. This evidenced the pronounced anisotropy of boundary energy with respect to its inclination. The random (non-tilt) boundary in the Zn bicrystal assumed a curved shape after magnetic annealing. Evaluation of the curvature of the boundary segments with the highest constant curvature permitted estimation of the upper limit of the energy of differently inclined boundary sections in Zn: 0.27 and 0.41 J m−2.
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发表时间: 2011
期刊: Acta Materialia
影响因子: 9.4
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