使用强力控制的 Tribometer 评估蒸汽酸的温度依赖的边界滑行为
Adarsh Divakaran1, Vikas K Singh1, Shubha H Nataraj1
1Department of Mechanical Engineering, IISc, Bangalore 560012, India.
Langmuir : the ACS journal of surfaces and colloids
|March 26, 2024
概括
一个新的试管计在极限条件下精确地测量滑油摩擦力. 酸添加剂通过形成温度依赖的 tribofilm 减少摩擦,FTIR 和 XPS 分析证实了这一点.
科学领域:
- 三角学和滑科学 三角学和滑科学
- 材料科学与工程 材料科学与工程
背景情况:
- 准确评估滑剂添加剂的有效性对于配方至关重要.
- 由于传感器诱导的刚度变化,传统的三角计经常遭受测量错误.
- 在边界滑条件下了解滑剂的行为对于性能预测至关重要.
研究的目的:
- 引入和评估一款用于精确测量摩擦的新型横向力控制的三角计.
- 为了研究温度对基油和酸 (SA) 混合物的摩擦性能的影响.
- 为了阐明在不同温度下通过酸减少摩擦的机制.
主要方法:
- 开发了一种侧向力控制的三角计,使用一个基于的系统来间接测量摩擦力.
- 通过测量振荡幅度衰减,在边界滑下评估滑剂摩擦.
- 使用富里埃变换红外光谱 (FTIR) 和X射线光电子光谱 (XPS) 分析滑剂样本和磨损表面.
主要成果:
- 这种新型的摩擦计可以准确地测量摩擦,而不会改变接触硬度.
- 与单独的基油相比,酸 (SA) 显著降低了摩擦能耗.
- 摩擦能耗随着基础油的温度增加而增加,但由于triofilm的形成,SA混合物的摩擦能耗下降.
结论:
- 开发的三角计为评估滑油摩擦性能提供了一种可靠的方法.
- 酸作为一种有效的有机摩擦修饰剂,形成一种保护性 tribofilm.
- 随着温度的增加,片的形成和厚度增加,导致SA混合物中增强的摩擦降低.
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