方媛,闫嘉琪,赵顺强,曾立军,吴燕.MoS2/Ti3C2Tx对磷酸盐涂层宽温域摩擦学性能的影响[J].表面技术,2024,53(1):56-64.
FANG Yuan,YAN Jiaqi,ZHAO Shunqiang,ZENG Lijun,WU Yan.Effect of MoS2/Ti3C2Tx on Tribological Properties of Phosphate Coating at Elevated Temperature[J].Surface Technology,2024,53(1):56-64 |
| MoS2/Ti3C2Tx对磷酸盐涂层宽温域摩擦学性能的影响 |
| Effect of MoS2/Ti3C2Tx on Tribological Properties of Phosphate Coating at Elevated Temperature |
| 投稿时间：2022-10-24 修订日期：2023-05-18 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.01.005 |
| 中文关键词: Ti3C2Tx 宽温域 摩擦磨损性能 磷酸盐涂层 磨损机制 |
| 英文关键词:Ti3C2Tx wide temperature range friction and wear properties phosphate coating wear mechanism |
| 基金项目:国家重点研发计划(2022YFB3809000);国家自然科学基金(51705300);陕西省科技厅自然科学基础研究计划(2022JM-267);陕西科技大学博士科研启动基金(2017BJ-05) |
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| Author | Institution |
| FANG Yuan | School of Material Science & Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China |
| YAN Jiaqi | School of Material Science & Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China |
| ZHAO Shunqiang | School of Material Science & Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China |
| ZENG Lijun | School of Material Science & Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China |
| WU Yan | School of Material Science & Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China |
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| 中文摘要: |
| 目的 以MoS2/Ti3C2Tx为固体润滑剂，在25(室温)~400 ℃下制备具有优异摩擦学性能的MoS2/Ti3C2Tx磷酸盐涂层，并研究它在不同温度下的减摩抗磨机制。方法 以氢氟酸为MAX相(Ti3AlC2)粉体的蚀刻剂，制备具有“手风琴”形貌的Ti3C2Tx MXene。以硫脲、钼酸铵、MXene为原料，制备MoS2/Ti3C2Tx复合材料。以Al(H2PO4)3为黏结剂，以CuO为固化剂，分别以Ti3C2Tx和MoS2/Ti3C2Tx为固体润滑剂，制备Ti3C2Tx磷酸盐涂层和MoS2/Ti3C2Tx磷酸盐涂层。通过高温摩擦磨损试验机和光学数码显微镜测试涂层在25~400 ℃时的摩擦因数和磨损率，采用扫描电子显微镜和显微共焦激光拉曼光谱仪分析磨痕表面形貌、物相，进而探讨磨损机理。结果 当Ti3C2Tx与Al(H2PO4)3的质量比为2∶1时，Ti3C2Tx磷酸盐涂层在室温(25 ℃)下的摩擦因数和磨损率均最低，分别为0.38和2.75×10−4 mm3/(N.m)。在Ti3C2Tx表面负载MoS2，将MoS2/Ti3C2Tx作为固体润滑剂，能够显著降低磷酸盐涂层在25~400 ℃下的摩擦因数，同时磨损率也有所降低。MoS2/Ti3C2Tx磷酸盐涂层在室温下的摩擦因数低至0.11，相较于Ti3C2Tx磷酸盐涂层降低了71.1%，其磨损率相较于Ti3C2Tx磷酸盐涂层降低了1个数量级。在25~400 ℃范围内，MoS2/Ti3C2Tx磷酸盐涂层的摩擦因数均低于0.21。随着温度的升高，摩擦因数呈先减小后增大的趋势，磨损率整体上呈增大趋势。结论 相较于Ti3C2Tx磷酸盐涂层，MoS2/Ti3C2Tx磷酸盐涂层在25~400 ℃下的摩擦学性能均得到显著提升。 |
| 英文摘要: |
| As a typical environmental-friendly inorganic coating, the phosphate coating is widely used in aerospace, petroleum pipelines and marine equipment because of its strong adhesion, outstanding thermal stability and good corrosion resistance. In the present study, a phosphate bonding solid lubricant coating with excellent tribological properties at room temperature 25 (RT)-400 ℃ was prepared with MoS2/Ti3C2Tx as solid lubricant, and its friction reduction and anti-wear mechanisms at different temperature were investigated in detail. Ti3C2Tx MXene with "accordion" shape was prepared with hydrofluoric acid as etching agent from MAX phase (Ti3AlC2) powders. And then MoS2/Ti3C2Tx powders were prepared with thiourea, ammonium molybdate and MXene as raw materials. A Ti3C2Tx phosphate coating and A MoS2/Ti3C2Tx phosphate coating were prepared with Al(H2PO4)3 as binder and CuO as curing agent, and Ti3C2Tx and MoS2/Ti3C2Tx as solid lubricant filler respectively. The friction coefficients and wear rates of the coatings at 25-400 ℃ were investigated with a high-temperature friction and wear tester and an optical digital microscope. The surface morphology and phase of the wear scars were analyzed with a scanning electron microscope (SEM), a confocal laser Raman spectrometer and an X-ray diffractometer (XRD) respectively, and then the wear mechanisms at different temperature were discussed in detail. The main results were as follows. When the mass ratio of Ti3C2Tx to Al(H2PO4)3 was 2∶1, The friction coefficient and wear rate of the Ti3C2Tx phosphate coating were the lowest at RT, which were 0.38 and 2.75×10−4 mm3/Nm, respectively. As the temperature increased, the friction coefficient of the Ti3C2Tx phosphate coating increased from 0.38 at RT (25 ℃) to 0.79 at 400 °C, and the wear rate increased from 2.75×10−4 mm3/(N.m) to 7.34×10−4 mm3/(N.m). Compared with the Ti3C2Tx phosphate coating, the MoS2/Ti3C2Tx phosphate coating had significantly reduced coefficients at 25-400 ℃ and reduced wear rates. The MoS2/Ti3C2Tx phosphate coating showed a low friction coefficient of 0.11 at RT, which was 71.1% lower than that of the Ti3C2Tx phosphate coating. Moreover, the wear rate of the MoS2/Ti3C2Tx phosphate coating was 6.77×10−5 mm3/(N.m), which was an order of magnitude lower than that of the Ti3C2Tx phosphate coating. Continuous lubricating films with a small quantity of furrows could be observed on the sliding surface at RT, which showed that the main wear mechanism was abrasive wear. As the sliding temperature ranged from RT to 400 °C, the friction coefficient of the MoS2/Ti3C2Tx phosphate coating was kept below 0.21. With the increase of temperature, the friction coefficient of the MoS2/Ti3C2Tx phosphate coating showed a trend of decreasing firstly and then increasing, and the wear rate showed an overall increasing trend. The furrows on the wear scar gradually disappeared, and the formed lubricating films became smooth. From the Raman spectrum, mild oxidation could be found on the worn surface when the temperature was below 200 ℃, and the oxidation products were Ti3O5 and a small amount of MoO3. With the further increase of temperature, the oxidation degree of worn surfaces of the MoS2/Ti3C2Tx phosphate coating intensified. When the temperature was higher than 300 ℃, the oxidation products were TiO2 and MoO3. Owing to the synergistic lubrication of MoS2 and MoO3, the MoS2/Ti3C2Tx phosphate coating still has significant anti-friction property and improved wear resistance compared with the Ti3C2Tx phosphate coating at 400 ℃. |
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