In an increasing number of tribo-systems, liquid lubrication cannot be applied or its application is intended to be avoided due to environmental restrictions. Examples are plain bearings or linear guides both used in space applications and in industrial vacuum production devices, e.g. for flat screens. Moreover, the demand had grown to extend working temperatures of tribosystems and vacuum tribometers to 300 deg C. Therefore, a new formulation of polyimide (P84-HT) for higher temperatures was developed. Composites (SINTIMID) with selected fillers (MoS2, Grafite, PTFE, carbon fibres) were tested for their general properties (physical, thermal, mechanical, vacuum stability) up to 300 deg C and with regard to the ECSS requirements for materials working in space (vacuum). The SINTIMID compounds were successfully qualified according to this. However, this paper presents mechanical properties and friction and wear behaviour. Especially, the influences of environmental parameters - ''atmosphere'' and temperature -, but also load will be discussed and compared to other known materials, e.g. Vespel SP3. Tribological results will also be related to the different filler types and their combinations.


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    Title :

    Friction and wear of self lubricating polyimides in vacuum and air up to high temperatures


    Additional title:

    Reibung und Verschleiß von selbstschmierenden Polyimiden in Vakuum und Luft bis zu hohen Temperaturen


    Contributors:


    Publication date :

    2004


    Size :

    8 Seiten, 8 Bilder, 5 Tabellen, 11 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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