付传起,耿奥,丁亚东,汪滦.石墨烯含量对铜铁基自润滑摩擦材料组织结构及摩擦性能的影响[J].表面技术,2024,53(15):88-99.
FU Chuanqi,GENG Ao,DING Yadong,WANG Luan.Effect of Graphene Content on Microstructure and Friction Properties of Copper-iron-based Self-lubricating Friction Materials[J].Surface Technology,2024,53(15):88-99 |
| 石墨烯含量对铜铁基自润滑摩擦材料组织结构及摩擦性能的影响 |
| Effect of Graphene Content on Microstructure and Friction Properties of Copper-iron-based Self-lubricating Friction Materials |
| 投稿时间：2023-08-09 修订日期：2024-05-23 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.15.008 |
| 中文关键词: 铜铁基 石墨烯 自润滑摩擦材料 摩擦性能 磨损率 |
| 英文关键词:copper-iron-based graphene self-lubricating friction materials friction properties wear rate |
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| Author | Institution |
| FU Chuanqi | School of Mechanical Engineering, Dalian University, Liaoning Dalian 116622, China |
| GENG Ao | School of Mechanical Engineering, Dalian University, Liaoning Dalian 116622, China |
| DING Yadong | School of Mechanical Engineering, Dalian University, Liaoning Dalian 116622, China |
| WANG Luan | School of Mechanical Engineering, Dalian University, Liaoning Dalian 116622, China |
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| 中文摘要: |
| 目的 改善石墨烯与铜铁基摩擦材料的结合方式，探究不同含量的石墨烯对铜铁基摩擦材料组织结构的影响，研究加入不同含量石墨烯时摩擦材料的摩擦性能和摩擦机理。方法 采用粉末冶金冷压法制备铜铁基摩擦材料，利用SEM、XRD等分析方法和手段，探究不同含量石墨烯对摩擦材料的组织结构、综合力学性能和摩擦性能的影响规律，确定最佳工艺参数。结果 在铜铁基摩擦材料中加入石墨烯时，其密度和抗压强度随着石墨烯含量的增加呈下降趋势，硬度呈先上升后降低的趋势。在相同转速下，随着石墨烯含量的增加，其摩擦材料的摩擦因数呈下降趋势，磨损率呈现先下降后上升的趋势。在石墨烯的质量分数为0.5%时，摩擦材料的摩擦率最小，为2.52×10−9 mm3/(N.m)，此时摩擦材料的磨损机理为黏着磨损及少量磨粒磨损。结论 在铜铁基摩擦材料中，石墨烯作为润滑组元，与基体的结合性能表现优异，对比石墨烯对铜铁基摩擦材料的影响规律可知，在石墨烯的质量分数为0.5%时，摩擦材料的性能最佳。 |
| 英文摘要: |
| Graphene, known for its exceptional mechanical, electrical, and thermal properties, has attracted significant attention as a potential additive to enhance various materials' performance, including friction materials. Copper-iron-based friction materials find wide applications in brakes and clutches. However, optimizing the bonding between graphene and copper-iron-based materials is crucial to improve their overall performance. This study aims to investigate the effect of different graphene contents on the microstructure, friction property, and friction mechanism of copper-iron-based friction materials. Copper-iron-based friction materials were prepared using the powder metallurgy cold pressing method. Different amounts of graphene (0, 0.2%, 0.5%, and 1.0%) were added to the materials, followed by sintering at specific temperature. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were utilized for microstructure analysis. Mechanical property testing, including density, compressive strength, and hardness measurements, were conducted. The friction property testing was performed using a tribometer to determine the friction coefficient and wear rate. Microstructure analysis revealed that graphene addition resulted in a more refined and uniform microstructure compared with materials without graphene. SEM images showed well-dispersed graphene sheets within the matrix, while XRD analysis confirmed their presence. As graphene content increased, density and compressive strength decreased due to graphene's low density. However, hardness initially increased due to the reinforcement effect of graphene sheets and then decreased as graphene agglomerated and defects formed. The friction property testing demonstrated a decrease in friction coefficient with the increase of graphene content, attributed to graphene's lubricating effect reducing friction. The wear rate initially decreased, indicating improved wear resistance. However, at higher graphene contents, the wear rate increased, possibly due to graphene agglomeration leading to abrasive wear. In conclusion, the addition of graphene improves the microstructure, friction property, and wear resistance of copper-iron-based friction materials. The optimum performance is observed at a graphene content of 0.5%, exhibiting lower friction coefficient and improved wear resistance. Microstructure analysis reveals a more refined and uniform structure in materials with graphene. Mechanical property testing indicates the influence of graphene content on density, compressive strength, and hardness. Friction property testing demonstrates graphene's effectiveness in reducing friction coefficient and improving wear resistance. These findings contribute to understanding the influence of graphene on copper-iron-based friction materials, providing valuable insights for advanced friction material development. |
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