Influences of Nano-Silica on Friction and Noise Properties of Urea Grease


Article Preview

Tribological properties of the urea grease containing nano-silica were investigated with a four-ball tester, and its noise characteristics were evaluated with a BVT-1 bearing vibration tester. The results showed that the nano-silica has good effects on friction and wear resistances, the urea grease with 3% nano-silica has the least value of friction coefficient, and the urea grease with 2% nano-silica showed the best wear resistance. A proper amount of nano-silica can decrease the noise of the urea grease, and when lubricated by the grease with 1% nano-silica, the bearing achieved its lowest noise level as well as the best velocity values of both intermediate and high frequencies.



Edited by:

Daizhong Su, Qingbin Zhang and Shifan Zhu




J. H. Yin et al., "Influences of Nano-Silica on Friction and Noise Properties of Urea Grease", Key Engineering Materials, Vol. 450, pp. 189-193, 2011

Online since:

November 2010




[1] Wang J G, Zhu P H, Zh X F: Mechanical&Electrical Engineering: Vol. 22-10(2005), p.48.

[2] Bai Ch H: Synthetic Lubricants, Vol. 33- 3(2006), p.1.

[3] Mi H Y, Guo X Ch, Yang T D: Chinese Journal of Mechanical Engineering, Vol. 42-9 (2006), p.233.

[4] Tao D H, Hu H Zh, Yang T Y: Lubrication Engineering, Vol. 2(1985), p.11.

[5] Cao Zh, Li X H, Zhang Zh J: Tribology, Vol , 25-5 (2005), p.390.

[6] Li Ch F, Chen B Sh, Luo X M: Tribology, Vol , 28-2 (2008), p.133.

[7] Wang L B, Feng D P, Liu W M: Tribology, Vol. 25-2 (2005), p.107.

[8] Wang L B, Liu W M: Lubrication Engineering, Vol. 2 (2006), p.46.