Aging model for solid lubricants used in weapon stronglinks: tribological performance and hardware review
- Sandia National Labs., Albuquerque, NM (United States)
- Allied Signal, Kansas City, MO (United States). Federal Manufacturing and Technology
The solid lubricant used most extensively in strong links throughout the enduring stockpile contains MoS{sub 2}, which is known to react with oxygen and water vapor resulting in a change in the material`s friction and wear behavior. The authors have examined the frictional behavior of this lubricant as a function of oxidation, in support of efforts to quantify the impact of changes in the material on the dynamic behavior of the MC2969 strong link. Their results show that the friction response of oxidized lubricant is strongly influenced by the amount of burnishing performed on the lubricant after deposition. Low levels of burnish leave a thick film, of which only the near surface degrades during oxidation. Rapid wear of the oxidized material leaves a surface whose properties are the same as non-oxidized material. Higher levels of burnish leave a thinner film of lubricant such that the entire film may be oxidized. The friction coefficient on this surface reaches a steady state value greater than that of non oxidized material. In addition to these fundamental differences in steady state behavior, they have shown that the initial friction coefficient on oxidized surfaces is related to the amount of sulfide converted to sulfate, regardless of the oxidation conditions used. Measurements on parts returned from the stockpile show that the friction behavior of aged hardware is consistent with the behavior observed on controlled substrates containing thin lubricant films.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 642738
- Report Number(s):
- SAND-97-2009C; CONF-970982-; ON: DE98000196; TRN: AHC2DT02%%64
- Resource Relation:
- Conference: 21. aging, compatibility, and stockpile stewardship conference, Albuquerque, NM (United States), 30 Sep - 2 Oct 1997; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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