Laboratory for Dynamics of Machines and Structures
Wear Rate vs Dynamic and Material Properties at Elevated Temperatures for a Copper-Graphite Brush
J. Slavič and
Journal of Mechanical Engineering, Volume 64 (3), February 2018, Pages 169-175
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 %.