Kim Kyungmok
School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76 Hanggongdaehang-ro, Deogyang-gu, Goyang-si, Gyeonggi-do 412-791, Korea.
Materials (Basel). 2015 Jul 28;8(8):4778-4789. doi: 10.3390/ma8084778.
This article describes fretting behavior of zirconia and silicon nitride balls on an electro-deposited coating. Fretting tests are performed using a ball-on-flat configuration. The evolution of the kinetic friction coefficient is determined, along with slip ratio. Experimental results show that the steady-state friction coefficient between ceramic balls (Si₃N₄ and ZrO₂) and an electro-deposited coating is about 0.06, lower than the value between AISI 52100 ball and the coating. After a steady-state sliding, the transition of the friction coefficient is varied with a ball. The friction coefficient for ZrO₂ balls became a critical value after higher fretting cycles than those for Si₃N₄ and AISI 52100 balls. In addition, it is identified that two parameters can describe the transition of the friction coefficient. Finally, the evolution of the friction coefficient is expressed as an exponential or a power-law form.
本文描述了氧化锆球和氮化硅球在电沉积涂层上的微动行为。采用球-平面配置进行微动试验。测定了动摩擦系数随滑移率的变化。实验结果表明，陶瓷球（Si₃N₄和ZrO₂）与电沉积涂层之间的稳态摩擦系数约为0.06，低于AISI 52100球与该涂层之间的值。在稳态滑动后，摩擦系数的转变因球而异。氧化锆球的摩擦系数在比氮化硅球和AISI 52100球更高的微动循环次数后达到临界值。此外，确定了两个参数可以描述摩擦系数的转变。最后，摩擦系数的变化表示为指数形式或幂律形式。
