A Study on The Tribological Characteristics of Graphite Nano Lubricants

作者：Lee Chang Gun; Hwang Yu Jin; Choi Young Min; Lee Jae Keun^*; Choi Cheol; Oh Je Myung

来源：International Journal of Precision Engineering and Manufacturing, 2009, 10(1): 85-90.

DOI：10.1007/s12541-009-0013-4

• Graphite nanoparticles
• Lubrication
• Nano lubricant
• Disk-on-disk tribotester
• Stribeck curve

Many researchers have tried to improve the tribological characteristics of lubricants to decrease friction coefficients and wear rates. One approach is simply, the use of additives in the base lubricant to change its properties. Recently, nanoparticles have emerged as a new kind of additive because of their size, shape and other properties. A nano lubricant is a new kind of engineering lubricant made of nanoparticles, dispersant, and base lubricant. In this study, graphite nanoparticles were used to fabricate nano lubricants with enhanced tribological properties and lubrication characteristics. The base lubricant used was industrial gear oil, which has a kinematic viscosity of 220 cSt at 40 degrees C. To investigate the physical and tribological properties of nano lubricants, friction coefficients and temperatures were measured by a disk-on-disk tribotester. The surfaces of the fixed plates were observed by a scanning electron microscope and an atomic force microscope to anaylze the characteristics of the friction surfaces. The results show that when comparing fixed plates coated with raw and nano lubricants, the plate coated with a nano lubricant containing graphite nanoparticles had a lower friction coefficient and less wear. These results indicate that graphite nanoparticle additives improve the lubrication properties of regular lubricants.

• 出版日期2009-1