AVS 63rd International Symposium & Exhibition
    Advanced Surface Engineering Wednesday Sessions
       Session SE+TR-WeM

Paper SE+TR-WeM2
Investigation of Friction and Wear for the Oxide-Oxide Contact in the Piston Ring–liner System

Wednesday, November 9, 2016, 8:20 am, Room 101C

Session: Protective Coatings for Tribological Applications in Surface Engineering
Presenter: Jürgen Ramm, Oerlikon Balzers, Oerlikon Surface Solutions AG, Liechtenstein
Authors: P. Ernst, Oerlikon Metco AG, Wohlen, Switzerland
P. Luethy, Oerlikon Metco AG, Wohlen, Switzerland
Ch. Bohnheio, Oerlikon Metco AG, Wohlen, Switzerland
F. Seibert, Oerlikon Balzers, Oerlikon Surface Solutions AG, Liechtenstein
B. Widrig, Oerlikon Balzers, Oerlikon Surface Solutions AG, Liechtenstein
J. Ramm, Oerlikon Balzers, Oerlikon Surface Solutions AG, Liechtenstein
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The reduction of friction and wear are important issues in the development and optimization of internal combustion engines increasing their efficiency and reducing the service interval times. One possibility to increase the efficiency of an engine is an operation at higher temperature. Surface coating could help to keep the standard materials and extend their operation range to higher temperatures. In this work, the friction and wear of oxide coatings are investigated and compared with coatings which are standard for an engine like Nikasil and Fe- based liner coatings and CrN for piston rings. The oxide coating material was first tested in a SRV test and the coefficient of friction against steel and alumina was measured for dry and lubricated conditions. In addition, the wear of the coatings and the steel or alumina counter-part was inspected. The most promising coating combinations were tested in a motor-bike engine configuration and compared with standard material.