Accession Number:

ADA482540

Title:

Exploratory Experiments in the Tribological Behavior of Engineering Surfaces with Nano-Coating Using a Tribo-Rheometer

Descriptive Note:

Final rept. Apr 2007-Mar 2008

Corporate Author:

CALIFORNIA UNIV REGENTS LOS ANGELES

Personal Author(s):

Report Date:

2008-05-30

Pagination or Media Count:

13.0

Abstract:

Funding was provided by the Air Force Office of Scientific Research in order to support exploratory experiments for probing the tribological behavior of nano-coatings on real surfaces. Recent experiments have shown desirable tribological properties for these materials. However, most of these experiments are performed on coated surfaces which are not used in the real life application. We explored the tribological properties of these solid-liquid-solid systems by the triborheometry fixture that can be utilized with a commercial torsional rheometer in order to explore the coupled rheological and tribological properties of complex fluids and solid-liquid systems. Using this new triborheometer fixture it is possible to obtain tribological information over a wider range of sliding velocities than is typically possible using conventional devices such as pin-and-disk systems. We seek to expand the detailed understanding of tribological systems when nano-coating is used on real surfaces. In particular, generating Stribeck curves provides a road map for the designer of such systems for a range of velocities, temperatures and other environmental factors.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Test Facilities, Equipment and Methods
  • Fluid Mechanics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE