Accession Number:

ADA634599

Title:

Micro-Tribological Performance of MoS2 Lubricants with Varying Au Content

Descriptive Note:

Journal article

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA PHYSICAL SCIENCES LABS

Report Date:

2011-02-05

Pagination or Media Count:

9.0

Abstract:

Microtribological testing with a spherical diamond tip radius 100 pm was conducted on two AU-M0S2 coatings with 32 at. and 84 at. Au. For lower loads 0.2 to 2.0 mN, the performance of both coatings was similar, with minimal wear 50 nm depth and relatively stable friction coefficients. At higher loads 3,0- 5.0 mN, similar trends were found for the 84 at. Au specimen, but the 32 at, Au sample wore severely and the friction became unstable. Non-linear curve fitting of friction coefficient versus normal load was conducted using a model containing an elastic Hertzian term and a plastic plowing term. Changes in the two contributions to the friction with time were used to explain the differences in performance observed between the two coatings,

Subject Categories:

  • Electrical and Electronic Equipment
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE