Nanomechanical and Nanotribological Properties of an Antiwear Tribofilm Produced from Phosphorus-Containing Additives on Boundary-Lubricated Steel Surfaces

[+] Author and Article Information
K. Komvopoulos, V. Do

University of California, Department of Mechanical Engineering, Berkeley, CA 94720

E. S. Yamaguchi

Chevron Oronite Co., Richmond, CA 94802

P. R. Ryason

Tamalpais Tribology, Fairfax, CA 94930

J. Tribol 126(4), 775-780 (Nov 09, 2004) (6 pages) doi:10.1115/1.1792696 History: Received February 16, 2004; Revised May 24, 2004; Online November 09, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
Inverted images of nanoindentations on surface regions (a) off and (b) on the wear track obtained with a Berkovich diamond tip of nominal radius of curvature equal to 100 nm under an indentation load equal to 300 μN
Grahic Jump Location
(a) Reduced elastic modulus and (b) hardness versus contact depth of surface regions on and off the wear track obtained from nanoindentation experiments performed with a Berkovich diamond tip of nominal radius of curvature equal to 100 nm
Grahic Jump Location
Coefficient of friction versus lateral displacement obtained with a conical diamond tip of nominal radius of curvature equal to 20 μm under a normal load equal to (a) 100 μN, (b) 150 μN, and (c) 200 μN
Grahic Jump Location
(a) Coefficient of friction and (b) contact voltage versus sliding distance of AISI 52100 steel surfaces sliding on themselves in the presence of a blend consisting of gear base oil and ∼1 wt% alkyl amine phosphate additive at 100°C
Grahic Jump Location
Representative nanoindentation load versus depth curves of surface regions on and off the wear track obtained with a Berkovich diamond tip of nominal radius of curvature equal to 100 nm under a maximum indentation load in the range of 100–600 μN



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