Abstract
Two complementary approaches should be used for the full characterisation of friction pair components. The first approach consists of stereometric studies of machined as well as worn surface topography of the friction components with multiple measurement methods used. The second approach, tribometric studies, enables the tribological characteristics of the friction pair. This work presents the complete characterisation of polymeric pin and ceramic plate friction pair components based on studies with the use of three research instruments: an interference microscope, a scanning electron microscope and a tribological tester. The results of the studies showed that the same treatment conditions used for different but similar ceramic materials did not provide exactly the same characteristics of both the machined and worn surface topography. Moreover, the results showed that the material properties and machined surface topography of the ceramic component significantly affected the friction coefficient and linear wear as well as the wear intensity of the polymeric component. Connecting the two approaches, stereometric studies and tribometric studies, allowed for a better identification of the wear mechanism of the polymeric pin (i.e., abrasion, fatigue and adhesion wear) and the kind of wear products (polymeric material).
Highlights
IntroductionThe parameters of the technological process are selected in accordance with the materials and their properties in order to ensure the appropriate surface topography characteristics of the manufactured part in accordance with its intended use
The studies and analysis are concerned with ceramic materials (monocrystalline (MON) and polycrystalline (POL) ceramics) co-acting with a polymeric material (ultra-highmolecular-weight polyethylene (UHMWPE)) in a friction pair consisting of a polymeric pin and a ceramic plate
A surface analysis and characteristics of the friction pair components obtained from the finishing process were performed on the basis of the results presented in Table 3 (WLIM results; surface topography view and surface topography extraction view, surface texture parameters) and Figure 1 (SEM results; surface morphology)
Summary
The parameters of the technological process are selected in accordance with the materials and their properties in order to ensure the appropriate surface topography characteristics of the manufactured part in accordance with its intended use. The verification of the surface topography characteristic obtained in the technological process takes place during the operation process. Conducting observations of the operation process (including the identification of wear mechanisms and wear products) is limited due to the lack of access to the friction zone. For this reason, improving the tribological characteristics (including the friction coefficient, linear wear and wear intensity) take place through laboratory friction and wear studies (tribological tests) where it is possible to control the operation process at each stage
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