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Journal of Materials Science

, Volume 44, Issue 1, pp 266–273 | Cite as

Effects of alumina in nonmetallic brake friction materials on friction performance

  • Vladimír Tomášek
  • Gabriela KratošováEmail author
  • Rongping Yun
  • Yanli Fan
  • Yafei Lu
Article

Abstract

The effects of alumina (Al2O3) as an abrasive on brake friction performance and friction layers of nonmetallic brake friction materials were evaluated. Five experimental compositions containing from 0 to 14.6 vol% alumina were tested (Al2O3—0, 3.4, 5.6, 9.0, and 14.6 vol%). The experimental results indicated that alumina enhances friction coefficient and improves wear performance. The formation and development of friction layers were characterized using X-ray fluorescence spectrometry and scanning electron microscopy with energy dispersive X-ray analysis. Phenomena of baryte film and transferred iron-containing film formed on the friction surfaces were observed. Baryte films were detected on specimens containing from 0 to 5.6 vol% alumina. Iron-containing films were detected on surfaces of all alumina-containing specimens but not on the material without alumina. The role of abrasive in nonmetallic friction materials was studied in relation to formulation, friction performance, and friction surfaces.

Keywords

Wear Rate MoS2 Friction Surface Friction Material Friction Layer 

Notes

Acknowledgements

The authors acknowledge National Natural Science Foundation of China (50673012), Twaron Research Fund (Teijin Twaron GmbH, Germany, 2007), Programs of International Cooperation funded by Ministry of Education, Youth and Sports of Czech Republic 1P05ME741, and Ministry of Education, Youth and Sports of the Czech Republic (MSM 6198910016) for their financial supports.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Vladimír Tomášek
    • 1
  • Gabriela Kratošová
    • 1
    Email author
  • Rongping Yun
    • 2
  • Yanli Fan
    • 2
  • Yafei Lu
    • 2
  1. 1.Nanotechnology Centre, VSB-Technical University of OstravaOstrava-PorubaCzech Republic
  2. 2.The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer MaterialsBeijing University of Chemical TechnologyBeijingChina

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