Oxidation of MoS/sub 2/ by thermal and hyperthermal atomic oxygen
The present study shows that at 1.5 eV O-atom translational energy SO/sub 2/ is generated and out gasses from a anydrous MoS/sub 2/ surface with a reactivity comparable that of kapton. The reaction of atomic oxygen with MoS/sub 2/ has little or no translational energy barrier, i.e., thermalally generated atomic oxygen reacts as readily as that having 1.5 eV of translational energy. It has also been shown that water present in the flowing afterglow apparatus used to study thermal O-atom reactivity formed sulfates on the MoS/sub 2/ surface and that the sulfate is most likely in the form of sulfuric acid. These results imply that water dumps or outgassing in low earth orbits have the potential of forming sulfuric acid covered surfaces on MoS/sub 2/ lubricants. 9 refs., 2 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA); Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- W-7405-ENG-36; AC04-76DP00789
- OSTI ID:
- 5997693
- Report Number(s):
- LA-UR-89-956; CONF-890664-1; SAND-89-0106C; ON: DE89009273
- Country of Publication:
- United States
- Language:
- English
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CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY
FILMS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETIC ENERGY
LUBRICANTS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NONMETALS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SULFURIC ACID
THIN FILMS
TRANSITION ELEMENT COMPOUNDS