Improved wetting of Al2O3 by molten Sn with Ti addition at 973-1273 K
Improved wetting of Al2O3 by molten Sn with Ti addition at 973-1273 K
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在 973-1273 K 下添加 Ti 的熔融 Sn 改善了 Al2O3 的润湿性
DOI：
10.1016/j.jallcom.2017.12.350
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发表时间：
2018
影响因子：
6.2
通讯作者：
Lin Qiaoli
中科院分区：
文献类型：
--
作者：
Sui Ran;Ju Chunyan;Zhong Weiqiang;Lin Qiaoli
熔融Sn-（2.5at.%）对多晶Al 2 O3的润湿采用改进的座滴法在973-1273 K高真空条件下对钛合金进行了研究。Ti的加入可以明显改善润湿性，且不会形成连续反应层。润湿机理主要是Ti吸附导致液/固界面自由能降低。用统计热力学模型预测了最终接触角，与实验结果吻合。扩散动力学在大部分范围内受吸附动力学控制。吸附和反应控制的铺展模型的描述几乎具有相同的表达式，但吸附润湿的活化能远小于反应产物控制的润湿。
Wetting of polycrystalline Al2O3by molten Sn-(2, 5 at.%) Ti alloys using modified sessile drop method under high vacuum at 973–1273 K was studied. Ti addition can improve wettability definitely without the precipitation of the continuous reaction layer. The wetting mechanism should be mainly ascribed to Ti adsorption that induced the decrease of liquid/solid interfacial free energy. The statistical thermodynamic model was used for the prediction of final contact angles and satisfied the experimental results. Spreading dynamics were controlled by the adsorption dynamics in the most of the range. The description of adsorption or reaction controlled spreading model has almost the same expression, but the activation energies of adsorption wetting are much smaller than that of reaction product controlled wetting.