在高压下,水在光滑的不钢表面上的动态接触角的温度依赖
Guo-Tao Fu1, Yan-Jie Li1, Li-Wu Fan1,2,3
1Institute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, People's Republic of China.
Langmuir : the ACS journal of surfaces and colloids
|April 30, 2024
概括
在高温和高压下研究了水在不钢上的动态接触角度. 前进的角度保持稳定,直到接近和,而后退的角度随温度而变化,影响接触角度歇斯底里.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 热力学是一种热力学.
背景情况:
- 了解动态接触角 (DCA) 对金属表面的温度依赖,特别是在高压下,对于各种工业应用至关重要.
- 现有的模型往往不能完全捕捉极端条件下水金属相互作用的复杂行为.
研究的目的:
- 研究水在不钢316 (SS316) 上的前进接触角度 (ACAs),后退接触角度 (RCAs) 和接触角度歇斯底里 (CAH) 的温度和压力依赖性.
- 为了阐明影响这些动态接触角行为在不同的热和压力条件下的潜在机制.
主要方法:
- 使用动态滴法测量SS316上的水的DCA.
- 在高达300°C的温度范围内和高达10MPa的压力下进行了实验.
主要成果:
- 与静态接触角度相比,DCAs显示出明显的温度依赖.
- 在接近和温度之前,ACA几乎保持不变,这归因于蒸发减少.
- RCA呈现了线性下降至120°C以下,并在此以上稳定,温度影响滴滴钉定和退缩模式.
- 在所有测试压力范围内,CAH显示了与温度的特征性"增加-持续-减少"三线关系.
结论:
- 这项研究揭示了SS316在高温条件下水的动态接触角度的独特温度依赖行为.
- 蒸发和表面结效应显著影响ACA和RCA,分别.
- 预计SS316的固体表面和固体气体界面张力提供了有价值的材料性能数据.
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