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Investigation of Al 2 O 3 ‐ and SSiC‐ceramic under lubricated, reciprocating sliding contact and cavitation erosion
Author(s) -
Dulias U.,
Zum Gahr K.H.
Publication year - 2005
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.200500860
Subject(s) - materials science , tribometer , reciprocating motion , ceramic , metallurgy , lubrication , cavitation , tribology , cavitation erosion , surface roughness , surface finish , composite material , grinding , mechanical engineering , engineering , physics , mechanics , gas compressor
Tribological performance of alumina and silicon carbide ceramics as well as of the hardened steel 100Cr6 for reference was studied during reciprocating sliding and cavitation erosion in isooctane as substitute of gasoline and in distilled water. It was the aim to characterize effects of surface finish of the specimens and the liquid media on friction, resistance to sliding wear and cavitation erosion. Sliding wear tests were run on the self‐mated ceramics and ceramic/steel pairs under conditions of boundary lubrication using a laboratory tribometer with cylinder‐on‐plate geometry. Vibratory cavitation erosion tests were conducted according to ASTM G 32‐92. High initial surface roughness of coarse ground specimens led to a distinct running‐in period during sliding contact with a transition from high to low values of friction coefficient and wear intensity. Incubation time was reduced with increasing surface roughness in the cavitation tests. Depending on the materials investigated, the type of liquid media showed strong effects both during reciprocating sliding and cavitation erosion.