芦荟胶液对Co-Cr-Mo合金摩擦学性能影响的研究

发布时间：2018-04-12 17:31

本文选题：芦荟胶液 + Co-Cr-Mo合金　；参考：《表面技术》2017年06期

【摘要】：目的芦荟多糖胶液具有良好的流变性和生物相容性,有望成为一种绿色润滑液。方法首先提取新鲜芦荟胶液充当润滑液,采用红外光谱分析芦荟胶液中的多糖成分。在球-盘摩擦实验装置上分别研究干摩擦、水和芦荟胶液润滑下,氧化锆陶瓷球与Co-Cr-Mo合金对磨时的润滑行为,并对不同润湿性的Co-Cr-Mo表面的摩擦学性能进行初步探讨。最后利用扫描电镜和能谱仪分析磨损表面的微观形貌和元素分布。结果润湿性对Co-Cr-Mo表面的摩擦学性能有显著影响。干摩擦条件下,疏水性表面的平均摩擦系数为0.65,低于亲水性表面的摩擦系数。水润滑时,疏水性表面的平均摩擦系数为0.35,要比亲水性表面的低20%左右。当采用芦荟胶液润滑时,Co-Cr-Mo表面的摩擦系数显著降低,其中亲水性表面的摩擦系数更稳定,其平均摩擦系数仅为0.28。结论芦荟胶液润滑条件下,合金表面的磨损较轻,其主要磨损形式表现为轻微的犁沟。芦荟胶液中的多糖组分在摩擦作用下在摩擦表面形成转移膜,对Co-Cr-Mo合金起到润滑防护的作用。
[Abstract]:Objective Aloe polysaccharide gum has good rheological properties and biocompatibility and is expected to be a green lubricant.Methods at first, fresh aloe gel was extracted as lubricating fluid, and the polysaccharides in aloe gel were analyzed by infrared spectrum.The lubrication behavior of zirconia ceramic ball and Co-Cr-Mo alloy during grinding under dry friction, water and aloe gel was studied on a ball disk friction experimental device, and the tribological properties of Co-Cr-Mo surface with different wettability were preliminarily discussed.Finally, SEM and EDS were used to analyze the microstructure and element distribution of the wear surface.Results the wettability has a significant effect on the tribological properties of Co-Cr-Mo surface.Under dry friction, the average friction coefficient of hydrophobic surface is 0.65, which is lower than that of hydrophilic surface.When lubricated by water, the average friction coefficient of hydrophobic surface is 0.35, which is about 20% lower than that of hydrophilic surface.The friction coefficient of Co-Cr-Mo surface decreased significantly when aloe gel was used to lubricate the surface, and the friction coefficient of hydrophilic surface was more stable, the average friction coefficient was only 0.28.Conclusion under the condition of aloe gel lubrication, the wear of the alloy surface is lighter, and the main wear form of the alloy is a slight ploughing groove.The polysaccharides in aloe gel formed a transfer film on the friction surface under friction, which can lubricate and protect the Co-Cr-Mo alloy.
【作者单位】：西安理工大学机械及精密仪器工程学院;西安交通大学机械工程学院;
【基金】：国家自然科学基金项目(51605381) 陕西省教育厅专项项目(16JK1540)~~
【分类号】：R318.08;TG174.4

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