Micro-dimpled surface by ultrasonic nanocrystal surface modification and its tribological effects

作者：Amanov A^*; Cho I S; Pyoun Y S; Lee C S; Park I G

来源：Wear, 2012, 286: 136-144.

DOI：10.1016/j.wear.2011.06.001

• Ultrasonic nanocrystalline surface modification (UNSM) process
• Micro-dimple
• Sliding friction coefficient
• Sliding wear

It is well known that dimpled surface can improve tribological characteristics. The fundamental aim of the present research is to demonstrate the process of making micro-dimples by ultrasonic nanocrystalline surface modification (UNSM) technology and to evaluate its effects on tribological characteristics. Ball-on-disk test was performed in order to reveal the influence of mechanism and micro-dimples. UNSM-treated surface is compared to ground surface and friction coefficient of the UNSM-treated surface has been reduced by about 25%, which is a significant phenomenon in improving tribological properties of mating surfaces. Wear volume loss of UNSM-treated surface has also been reduced by about 60%. Scanning electron microscopy (SEM) and surface roughness profile measurement were utilized to study the worn surface.

• 出版日期2012-5-15