WEAR PATTERN TESTING OF CERAMIC COATINGS UNDER RECIPROCATING SLIDING
Journal Title: Tribologia - Year 2009, Vol 226, Issue 4
Abstract
A ball-on-plate system was used for the investigation of the wear of ceramic coatings. Coated stainless steel balls (Ø 5 mm) were sliding under constant load at a nominal surface pressure of 1,155 GPa on a ceramic coated face of stainless bar moving in a rectilinear reciprocating motion (sliding velocity 0.08 ±0.02 m/s, stroke 40 mm). Ultra thin coatings were tested, particularly DLC modified with a tungsten additive. Sliding contacts were lubricated either with distilled water or with aqueous solution of NaCl. The course of wear of the ceramic coating deposited on the specimen was evaluated by means of optical and scanning electron microscope observations. Prime objects for wear testing were the coated surfaces of stainless steel balls. The reciprocating flat counterface was examined as an auxiliary data source. Wear marks on the balls were elliptical in shape with the longer axis perpendicular to the direction of sliding. In rare cases, circular wear marks were observed. A variety of wear forms were observed: scratches, cracks, delamination, pits and steel substrate exposure. Some of the observed wear forms could be put down to imperfections in the coating. It is proposed that numerous forms of wear encountered should be classified into wear types in a systematic approach, e.g. based on such factors (in the case of crack propagation involving cases) as cause of crack initiation or crack type (instantaneous or fatigue).<br/><br/>
Authors and Affiliations
Krzysztof Druet
Keywords
Related Articles
- EP ID EP516702
- DOI -
- Views 52
- Downloads 0
POMIAR NIEUŻYWANYCH POWIERZCHNI MIKROŁOŻYSK Z NANOROWKAMI WENTYLATORA KOMPUTEROWEGO
W niniejszej pracy została przedstawiona analiza pomiarów dwóch nowych, niezużytych współpracujących powierzchni mikrołożyska występujących w wentylatorze komputerowym Kama Flow SP0825FDB12H 0,080 m. Powierzchnie te zasa...
Zużycie delaminacyjne stali AISI 304 w warunkach tribokorozji
W artykule przedstawiono wyniki badań zużywania korozyjno-mechanicznego (tribokorozji) stali AISI 304 w 3,5% roztworze NaCl. Badania wykonano na specjalistycznym stanowisku z węzłem modelowym typu pin-on-disc, zaprojekto...
ANALIZA WŁAŚCIWOŚCI TRIBOLOGICZNYCH NANOKOMPOZYTOWEJ POWŁOKI TiN/Si3N4 W STYKU ŚLIZGOWYM Z PRZECIWELEMENTEM CERAMICZNYM, STALOWYM I POLIMEROWYM
W niniejszej pracy dokonano analizy tarcia i zużycia twardej powłoki nanokompozytowej TiN/Si3N4 podczas współpracy z kulami ceramicznymi Al2O3, stalowymi 100Cr6 i polimerowymi PTFE. Powłoka została osadzona na próbkach z...
ANALYSES O F THE INFLUENCE OF CUTTING PARAMETERS FOR WEAR OF HEAD BLADE MILLING BY MACHINING OF COAL MATERIALS WPW-65
This article presents the results of analysis which have been carried out in industrial terms, concern wear intensity of knife blades of milling heads by machining of coal blocks. Blocks are carried out on materials WPW...
INFLUENCE OF THE SELECTED FILLERS ON THE PROPERTIES OF THE FRICTION MATERIALS
The paper presents the influence of the selected fillers – solid lubricants on the physics-mechanics and the tribological properties of friction materials for brake pads for commercial vehicles. The composite materials w...