Wear Rate vs Dynamic and Material Properties at Elevated Temperatures for a Copper-Graphite Brush
A. Turel, J. Slavič and M. Boltežar
Journal of Mechanical Engineering, Volume 64 (3), February 2018, Pages 169-175

download pdf   doi.org/10.5545/sv-jme.2017.5115
Abstract
A copper-graphite brush is used as a sliding part in the electrical contacts of electrical machines and usually operates at elevated temperatures. This experimental research relates the dynamic properties of the copper-graphite brush to its wear rate at elevated temperatures. The dynamic and material properties were researched using a dynamic response analysis, hardness test and differential scanning calorimetry. The results show that there is a key temperature range where the material properties of copper-graphite brush was changed and which reflects on the increases of damping by 15% and hardness decreases by 50 %.
Authors
R&D

Aleš Turel, PhD

  MAHLE Electric Drives Slovenija d.o.o..
  ales.turel@si.mahle.com
  
Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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