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The Effect of Spherical Silica Powder on the Tribological Behavior of Phenolic Resin–Based Friction Materials


The friction and wear behavior of friction materials filled with irregular silica, spherical silica and surface-treated spherical silica particles is discussed in this paper. Compared to irregular silica, spherical silica powders improve the wear resistance, but decrease the friction coefficient. Surface-treated spherical silica powder is more effective in the improvement in the wear resistance, but with the similar friction coefficient of irregular silica-filled materials. This makes it possible to be used as friction-improving fillers in brake materials. Mechanisms for the improvement are also discussed in this paper.

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The work was carried out under the financial support of the National Natural Science Foundation of China (No: NSFC51102218), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (No: CUG120402, CUG120118), the Fund for Outstanding Doctoral Dissertation of CUG (No: 2235122) and Wuhan Scientific and Technological Project (No: 20120321099).

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Correspondence to Yaoqing Wu or Shuen Hou.

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Jin, H., Wu, Y., Hou, S. et al. The Effect of Spherical Silica Powder on the Tribological Behavior of Phenolic Resin–Based Friction Materials. Tribol Lett 51, 65–72 (2013).

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  • Brakes
  • Friction mechanisms
  • Wear mechanisms
  • Abrasive wear