Oxygen Diffusion Enables Anti-Wear Boundary Film Formation on Titanium Surfaces in Zinc-Dialkyl-Dithiophosphate (ZDDP)-Containing Lubricants

Journal Article · Wed Dec 31 23:00:00 EST 2008 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2009.02.009· OSTI ID:949991

Qu, Jun ^[1]; Blau, Peter Julian ^[1]; Howe, Jane Y ^[1]; Meyer, III, Harry M ^[1]

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1. ORNL

This paper reports a wear reduction by up to six orders of magnitude for Ti-6Al-4V alloy when treated by an oxygen diffusion (OD) process and subsequently tested in a zinc-dialkyl-dithiophosphate (ZDDP)-containing lubricant. In addition to case hardening, it is discovered that OD enables the formation of an anti-wear boundary film on the titanium surface. Transmission electron microscopy and surface chemical analyses revealed that this boundary film has a two-layer structure comprising an amorphous oxide interlayer and a ZDDP-based top film with complex compounds.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory; Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 949991
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 10 Vol. 60; ISSN SCMAF7; ISSN 1359-6462
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
DIFFUSION
HARDENING
LUBRICANTS
OXYGEN
PROTECTIVE COATINGS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
WEAR RESISTANCE