Abstract This study presents and discusses the friction, wear and extreme pressure behavior of nanoparticles suspended in a gear base oil. Zero, 0.5, 1 and 2 %wt diamond and Zinc Oxide (ZnO) nanoparticles were separately dispersed in base stock and stabilized using a phosphonium ionic liquid. A rotary alumina ceramic ball on 20MnCr5 gear steel disc configuration was used to quantify the tribological performance of the formulated nanofluids. The results showed that the ionic liquid stabilizer in the base stock bonded to the surface of the disk resulted in the best anti-friction behavior but was accompanied by increased wear. The unique structure of diamond nanoparticles produced the best anti-wear behavior. Both diamond and ZnO nanoparticles stabilized with ionic liquid were effective in preventing scuffing. Thus, the nanoparticles have potential to be extreme pressure additives for gear oil applications. All concentrations of diamond nanoparticles and ZnO nanoparticles resulted in smoother surfaces after testing due to the nanoparticles acting as three body wear polishing agents.

中文翻译：

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用于极压应用的钢-陶瓷接触中的离子液体稳定纳米颗粒添加剂

摘要 本研究介绍并讨论了悬浮在齿轮基础油中的纳米颗粒的摩擦、磨损和极压行为。零、0.5、1 和 2%wt 金刚石和氧化锌 (ZnO) 纳米颗粒分别分散在基础油中并使用鏻离子液体进行稳定。使用 20MnCr5 齿轮钢盘配置上的旋转氧化铝陶瓷球来量化配制的纳米流体的摩擦学性能。结果表明，基料中的离子液体稳定剂与磁盘表面结合，产生了最好的减摩性能，但伴随着磨损增加。金刚石纳米颗粒的独特结构产生了最好的抗磨性能。用离子液体稳定的金刚石和 ZnO 纳米颗粒均可有效防止划伤。因此，纳米颗粒有可能成为齿轮油应用的极压添加剂。由于纳米颗粒充当三种身体磨损抛光剂，因此所有浓度的金刚石纳米颗粒和 ZnO 纳米颗粒在测试后都会产生更光滑的表面。