| 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],53(15):88-99 |
| Effect of Graphene Content on Microstructure and Friction Properties of Copper-iron-based Self-lubricating Friction Materials |
| Received:August 09, 2023 Revised:May 23, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.15.008 |
| KeyWord:copper-iron-based graphene self-lubricating friction materials friction properties wear rate |
| Author | Institution |
| FU Chuanqi |
School of Mechanical Engineering, Dalian University, Liaoning Dalian , China |
| GENG Ao |
School of Mechanical Engineering, Dalian University, Liaoning Dalian , China |
| DING Yadong |
School of Mechanical Engineering, Dalian University, Liaoning Dalian , China |
| WANG Luan |
School of Mechanical Engineering, Dalian University, Liaoning Dalian , China |
|
| Hits: |
| Download times: |
| Abstract: |
| 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. |
| Close |
|
|
|