Loading...

Synthesis and Investigation of Tribological Properties of Rubber-Based Friction Materials with low Friction Coefficient

Jamal Anaraki, Maryam | 2008

642 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39364 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar
  7. Abstract:
  8. Nowadays, replacement of traditional cast iron shoes with composite brake blocks is a main project in railway systems. The main purpose of this replacement is noise reduction( for example by about 10dB for a 100km/h freight train). One of the main sources of noise emission is the rolling sound of the wheel on the rail. The rougher and more out-of-round wheel surface, the greater the noise produced. Cast iron brake shoes, still widely used on freight wagons, make the wheel surface much rougher than composite brake blocks due to the fusing of minute metal particles into the tread surface during braking. It is therefore necessary to replace the current cast iron brake shoe with a synthetic composite shoe. For this replacement, friction coefficient of substituted composite material must be reduced to the range of cast iron friction coefficient. In this work, the effect of four selected fillers on tribologycal properties of a rubber-based friction material was investigated. These fillers are graphite, copper oxide, titanium oxide and zirconium oxide. Friction coefficient, wear and stability of frictional properties of the materials investigated and the results showed that the graphite and the copper oxide significantly reduce the friction coefficient of the base material. Mechanical properties of the materials were investigated, too
  9. Keywords:
  10. Frictional Material ; Graphite ; Titanium Oxide ; Friction Coefficient ; Copper Oxide ; Zirconium Oxide

 Digital Object List

  • محتواي پايان نامه
  •   view

 Bookmark

No TOC