Surface chemistry of MoS{sub 2} lubricant films: 1, Effects of high humidity storage on sputtered films

Technical Report · Fri May 01 00:00:00 EDT 1992

OSTI ID:10150974

Peebles, D E; Ohlhausen, J A

Many MoS{sub 2} lubricant film formulations exhibit tribological performance degradation after extended storage in high humidity ambient environments. As a part of an extensive study of the effects of high humidity storage on a wide variety of MoS{sub 2} lubricant film formulations, the effects of high humidity storage on sputtered MoS{sub 2} films have been examined. The surface chemistries of a series of ten different commercially deposited MoS{sub 2} lubricant film formulations on 440C stainless steel have been examined before and after 1 month of storage at 98% relative humidity. While the films varied greatly in film chemistry prior to high humidity storage, many smaller differences were observed after high humidity storage. Addition of Ni to the films affects the film chemistry far more dramatically than the addition of AuPd or SbO{sub x}, facilitating oxidation of the MoS{sub 2} and enhancing formation of sulfate species. All of the films are adequately characterized by considering only MoS{sub 2} and MoO{sub 3} species, with the exception of the films co-sputtered with Ni and ion implanted with N{sup +}, where some MoO{sub 2} or MoS{sub 2-x}O{sub x} must also be present.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 10150974
• Report Number(s): SAND-92-0052; ON: DE92015392
• Resource Relation: Other Information: PBD: May 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SOLID LUBRICANTS
THIN FILMS
MOLYBDENUM SULFIDES
TRIBOLOGY
QUANTITY RATIO
MOLYBDENUM OXIDES
HUMIDITY
CORROSIVE EFFECTS
SPUTTERING
STAINLESS STEEL-440
PHOTOELECTRON SPECTROSCOPY
SOFT X RADIATION
LAYERS
NICKEL
360604
400102
CORROSION, EROSION, AND DEGRADATION
CHEMICAL AND SPECTRAL PROCEDURES