WEAR RESISTANCE OF ELECTRODEPOSITED Fe-W ALLOY COATINGS UNDER DRY CONDITIONS AND IN THE PRESENCE OF RAPESEED OIL
Author(s) -
Alioicolenco,
Н. Цынцару,
Tadas Matijošius,
Svajus Asadauskas,
H. Cesiulis
Publication year - 2018
Publication title -
green tribology
Language(s) - English
Resource type - Journals
eISSN - 2351-5228
pISSN - 2351-521X
DOI - 10.15544/greentribo.2018.04
Subject(s) - materials science , tribology , abrasive , rapeseed , composite material , metallurgy , dry friction , galling , adhesion , dry lubricant , amorphous solid , friction coefficient , adhesive , layer (electronics) , chemistry , organic chemistry , food science
Amorphous Fe-W alloys with 25 at.% of W were electrodeposited under direct and pulse modes from glycolate-citrate bath with and without addition of polyethylene glycol. The tribological behavior of the coatings was studied at 1, 2 and 5 N loads under dry friction and in the presence of rapeseed oil films of 0.2-5.0 m thickness. The tribological behavior of obtained coatings at dry friction reveals their severe tribo-oxidation resulting in a high wear depth and coefficient of friction. Observed groove like surface with well-adhered particles inside the wear track point out on abrasive-adhesive wear mechanism of Fe-W alloys. In the presence of rapeseed oil films the wear mechanism changes, and values of coefficient of friction decrease up to 10 times compared to dry friction conditions. The optimum thickness of rapeseed oil film was 1 μm. This film has the satisfactory adhesion and uniform distribution on the surface, and could withstand up to 2 000 cycles.
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