Mechanisms of transferring the matter in a friction process in a tribology system: polymeric composite-metal

Polymeric composites are used in brake pads, brake linnings, brake couplings, etc. These elements work in variable environmental conditions. Sometimes, outside the tribology system, the temperature is about -60 deg C, but inside, the temperature often reaches 700 deg C or more. It is required that the coefficient of friction in these circumstances be stable in spite of a wear resistance less than 10 exp -7 m exp 3 MJ exp -1 . As shown in studies performed by the authors, the process of forming the structure and the property of these layers depend on the intensity of the reduction and transfer of the organic and non-organic composite's components which come into the contacted metal. The type of transfer and the quantity of the substance transferred in the friction process determine the friction properties of the tribology connections. Control of the tribology properties of these types of connections is possible by selecting a suitable elemental composition. This fact was confirmed by model scale laboratory experiments and experiments that were performed in close to realic conditions. The results obtained confirm the advantageous or destructive influences of substance transfer in the friction process on the tribological properties of the metal-polymeric composite connection. Materials discussed include cast iron and St3.