转移膜显影的原子力显微镜观察

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-07-16 DOI:10.1007/s11249-024-01893-x
Kathryn E. Shaffer, Edward J. McCumiskey, Brandon A. Krick, Jeffrey J. Ewin, Curtis R. Taylor, Christopher P. Junk, Gregory S. Blackman, W. Gregory Sawyer, Angela A. Pitenis
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引用次数: 0

摘要

原子力显微镜(AFM)提供了对复杂、动态和瞬态系统进行基础和机理观察的机会,并最终将摩擦学相互作用过程中的材料微观结构及其演变联系起来。本研究的重点是聚四氟乙烯(PTFE)与 5 wt% α-相氧化铝颗粒混合后与 304L 不锈钢滑动过程中形成的动态含氟聚合物三膜的演变。定期中断滑动以进行原子力显微镜形貌扫描。随着滑动周期的增加,记录了平均薄膜粗糙度、平均摩擦系数和基于样品高度衰退的聚合物磨损率。地形图显示,三膜在钢制反样品的凹槽中成核、扩散,并通过滑动形成一层均匀的薄膜。在 10,000 次滑动周期左右及其后,可以看到明显的纳米级特征。扫描电子显微镜和能量色散 X 射线光谱显示,这些特征与富铝域之间存在良好的相关性,表明表面存在氧化铝颗粒。
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Atomic Force Microscopy of Transfer Film Development

Atomic force microscopy (AFM) provides the opportunity to perform fundamental and mechanistic observations of complex, dynamic, and transient systems and ultimately link material microstructure and its evolution during tribological interactions. This investigation focuses on the evolution of a dynamic fluoropolymer tribofilm formed during sliding of polytetrafluoroethylene (PTFE) mixed with 5 wt% alpha-phase alumina particles against 304L stainless steel. Sliding was periodically interrupted for AFM topography scans. The average film roughness, the average friction coefficient, and polymer wear rate based on sample height recession were recorded as a function of increasing sliding cycles. Topographical maps suggested tribofilm nucleates in grooves of the steel countersample, spreads, and develops into a uniform film through sliding. Prominent nanoscale features were visible around 10,000 sliding cycles and thereafter. Scanning electron microscopy and energy-dispersive X-ray spectroscopy showed good correlations between these features and aluminum-rich domains, suggesting the presence of alumina particles on the surface.

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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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