Abstract
Innovative grease chemistries and additives are continuously developed to meet challenging applications such as wind energy bearings and offshore/underwater applications. The non-equilibrium and transient structures within interfacial tribofilms play an influential role in the service life of a component. Atom probe tomography and transmission electron microscopy studies were performed to investigate the tribofilms formed by lithium complex and calcium sulfonate grease thickeners. The study reveals that morphology, amorphicity, nanostructure, and atomic layering play an influential role in the exceptional wear and corrosion performance of calcium sulfonate thickeners.
| Original language | English |
|---|---|
| Pages (from-to) | 497-500 |
| Number of pages | 4 |
| Journal | CIRP Annals - Manufacturing Technology |
| Volume | 71 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2022 |
Funding
The authors thank The Timken Company for supporting the work and providing the permission to publish. The authors thank Mr. Bob Pendergrass (The Timken Company) and Mr. Henk Colijn (OSU) for TEM sample preparation and TEM analysis, respectively. The authors would also like to thank James Burns (ORNL) for his assistance in performing APT sample preparation and running the APT experiments. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility.
Keywords
- Lubrication
- Severe plastic deformation
- Tribofilm
