Effect of ultrasonic vibration on wetting of water/Cu, water/PTFE, E-GaIn/Cu and E-GaIn/graphite
Effect of ultrasonic vibration on wetting of water/Cu, water/PTFE, E-GaIn/Cu and E-GaIn/graphite
复制标题
超声波振动对水/Cu、水/PTFE、E-GaIn/Cu和E-GaIn/石墨润湿的影响
DOI：
10.1016/j.expthermflusci.2018.12.015
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发表时间：
2019-04-01
影响因子：
3.2
通讯作者：
Xu, Yang
中科院分区：
文献类型：
--
作者：
Lin, Qiaoli;Xing, Chunxiao;Xu, Yang
研究了超声波振动下原子/分子液体的润湿现象，探讨了扩散驱动力。在超声波振动下，润湿性可得到显着改善。液/固界面处的动量传递可以成为铺展的驱动力，但对于非润湿体系，对于接触角在90度附近的范围内是无效的。超声振动引起液/汽界面粗糙化（即液/汽界面处的毛细波）也可以是驱动力的来源。扩散取决于液体的物理性质，特别是取决于液体表面的毛细波。因此，在超声波辅助钎焊的应用中，超声波振动对润湿性的改善可能主要是由上述物理因素引起的，而不是液/固界面的化学反应。
The wetting of atomic/molecular liquid under the ultrasonic vibration were studied for probing of the spreading driving force. Under the ultrasonic vibration, the wettability can be improved significantly. The momentum transfer at the liquid/solid interface can be a driving force for spreading, but it is invalid for the contact angles in a range near 90 degrees for the non-wetting systems. The ultrasonic vibration induced the liquid/vapor interface roughening (i.e., the capillary wave at liquid/vapor interface) also can be a source of driving force. The spreading depended on the physic property of liquid, especially depended on the capillary wave on the surface of liquid. Therefore, in the application of ultrasonic-assisted brazing, the improved wettability by the ultrasonic vibration may be mainly caused by the mentioned physical factors rather than the chemical reaction at the liquid/solid interface.