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Nanoscale in situ study of ZDDP tribofilm growth at aluminum-based interfaces using atomic force microscopy

机译:纳米级原位研究了原子力显微镜基于铝基界面的ZDDP Tricofilm生长研究

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Zinc dialkyldithiophosphate (ZDDP)-based antiwear additives are crucial in automotive lubricants, where its effectiveness in reducing wear of ferrous alloys is well established. However, prior studies of light-weight aluminum-based alloys reveal that ZDDP is not as effective an anti-wear agent on Al-based surfaces for reasons that remain under debate. Here we use in situ atomic force microscopy (AFM) to study nanoscale ZDDP-derived tribofilms at the sliding interface between an alumina microcolloid probe and substrates comprised of either aluminum (with native oxide) or aluminum oxide (single crystal sapphire). The experiments reveal that ZDDP tribofilms form on both substrates, supporting the idea that tribofilm formation crucially involves thermally-activated, stress-assisted chemical reactions, and does not require cation exchange from wear debris originating from the substrate.
机译:二磷二磷酸(ZDDP)的抗磨添加剂在汽车润滑剂中是至关重要的,其在减少黑色合金磨损方面的有效性是很好的建立。 然而,对轻质铝基合金的先前研究表明,ZDDP在基于Al基表面上的抗磨损剂不是留在辩论下的原因。 在这里,我们使用原位原子力显微镜(AFM)在氧化铝微胶体探针和由铝(用天然氧化物)或氧化铝(单晶蓝宝石)组成的亚氧化铝微胶体探针和基板之间的滑动界面处研究纳米级ZDDP衍生的呋喃甲虫。 该实验表明,ZDDP呋喃酚在两个基材上形成,支持呋喃甲形成至关重要的思想,这是热活化的,应激辅助的化学反应,并且不需要从源自基材的磨损碎片交换。

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