YANG Shanlin, QIAO Yulin*, CUI Qingsheng, ZANG Yan, DONG Xinyu
(National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China)
Abstract: The tribological performance was investigated with different content of n-SiO2 additives, with or without ultrasonic vibration conditions, and the lubrication mechanism with ultrasonic vibration and n-SiO2 additives was discussed. The results show that ultrasonic vibration can improve the lubricating state of friction surface by three ways which are reducing the nano-particles suffered positive pressure, promoting the rolling of nano-particles and increasing the activity of friction surface. The wear scar depth and surface hardness decreased under n-SiO2 lubrication with ultrasonic vibration, the content of Si element in the wear surface increased, and the lubricating state of friction surface was effectively improved. Within the experimental range, the tribological performance was remarkably affected by ultrasonic vibration when the content of n-SiO2 additives is 0.5%, and the friction coefficient between friction pair and the wear volume of the 45 steel surfaces was reduced by 12% and 34% respectively.
Key words: ultrasonic vibration; SiO2 additives; friction-reducing and antiwear
E-mail: qiaoyulin1010@sina.com
Tribology, Vol. 32, Issue 4, 2012, 390~395
