International Scientific Conference BALTTRIB, 2017

EFFECTS OF ELECTROLYTE AND TI LAYERS ON STATIC AND DYNAMIC FRICTION OF ANODIZED ALUMINA

T. Matijošius, M. Gedvilas, P. Gečys, D. Vozgirdaitė, S. Asadauskas
Tribology Laboratory, Center for Physical Sciences and Technology, Vilnius, Lithuania; Dept. of Laser Technologies, Center for Physical Sciences and Technology, Vilnius, Lithuania; Faculty of Chemistry and Geosciences, Vilnius University, Lithuania; Tribology Laboratory, Center for Physical Sciences and Technology, Vilnius, Lithuania

Abstract

Static friction is important for many non-lubricated surfaces, especially when friction is intermittent. Coefficients of Friction (COF) were evaluated on industrial aluminum alloys 1050 and 6082, which were freshly anodized in sulfuric/oxalic or phosphoric acid electrolytes to 60 μm coating thickness. Hard anodizing significantly reduced COF. Under 10 N load friction trends were nearly identical despite sliding velocity variation from 0.02 to 0.5 cm/s, while 1 N load led to higher static COF. Magnetron sputtering was used to deposit Ti layers. Static COF went down from over 0.4 to ~0.2 in 16 nm and 75 nm thick layers, while that of 2.3 μm had no positive effect. Dynamic COF was also similarly reduced, suggesting possible industrial applications.

 

DOI: https://doi.org/10.15544/balttrib.2017.35

Keyword(s): Anodized alumina, Dynamic friction, Static friction, Ti sputtering.


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