In situ formation of tribologically effective oxide interfaces in SiC based ceramics during dry oscillating sliding.

Autor: Wäsche, Rolf, Klaffke, Dieter
Zdroj: Tribology Letters; Sep1998, Vol. 5 Issue 2/3, p173-190, 18p
Abstrakt: The tribological behaviour of single phase SiC as well as both SiC–TiC and SiC–TiC–TiB2 composite materials sliding against aluminium oxide has been investigated at room temperature with regard to the formation of wear reducing interfaces. The experiments were carried out in dry air for reasons of excluding the strong influence of water vapour. The introduction of the titanium phases into the SiC microstructure reduces the system wear by more than a factor of ten. The coefficient of friction is only slightly reduced but stabilised with time. The relatively abrasive oxide interface in the Al2O3/SiC pairing is altered to a soft and malleable oxide interface in the Al2O3/SiC–TiC–TiB2 pairing. The wear reduction is mainly caused by a change of the wear mechanism so that the formed soft oxide wear debris is transferred to the counterbody, thus shifting the sliding plane further into the layer. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: