Determination of the Solid-Liquid Interface Energy in the Al-Cu-Ag System
Determination of the Solid-Liquid Interface Energy in the Al-Cu-Ag System
复制标题
Al-Cu-Ag 体系固液界面能的测定
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Ludwig
中科院分区：
文献类型：
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作者：
A. Bulla;C. Carreño;B. Pustal;R. Berger;A. Bührig;A. Ludwig
固液界面能σSL在相变过程中起着重要作用。它对凝固形态和最终晶粒结构有很大的影响。Gündüz等人开发的“施加温度梯度的晶界凹槽”方法。[6]被发现适用于测量三元合金体系中的固-液界面能（例如，Al-Cu-Ag）。为了测量固液界面能，自行设计并组装了径向热流仪。该设备确保了数小时的稳定温度梯度，并导致化学平衡的晶界凹槽。快淬后，对试样进行金相制备，并对沟槽的局部曲率进行分析。为了确定界面能，吉布斯-汤姆逊方程，这需要的局部曲率的晶界凹槽和附着的局部过冷度从热通量模拟的凹槽的规模。
The solid-liquid interface energy, σSL, is of major importance during phase transformation. It has a strong influence on solidification morphologies and the final grain structure. The “grain boundary groove in an applied temperature gradient” method developed by Gündüz et al.[6] was found to be suitable for measuring the solid-liquid interface energy in ternary alloy systems (e.g., Al-Cu-Ag). In order to measure the solid-liquid interface energy, a radial heat flow apparatus was constructed and assembled. This apparatus ensures a stable temperature gradient for hours and leads to grain boundary grooves in chemical equilibrium. After rapid quenching, the samples were metallographically prepared and the local curvature of the grooves was analyzed. To determine the interface energy, the Gibbs–Thomson equation was used, which requires the local curvature of the grain boundary grooves and the adherent local undercooling obtained from heat flux simulations on the scale of the grooves.