Abstract
Correlative characterization using atom-probe tomography (APT) and transmission electron microscopy (TEM) was performed on a tribofilm formed during sliding frictional testing with a fully formulated engine oil, which also contains a boron-based additive. The tribofilm formed is ∼15 nm thick and consists of oxides of iron and compounds of B, Ca, P, and S, which are present in the additive. This study provides strong evidence for boron being embedded in the tribofilm, which effectively reduces friction and wear losses.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 64-67 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 111 |
| DOIs | |
| State | Published - Jan 15 2016 |
Funding
Atom-probe tomography measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) and the LEAP tomograph was purchased and upgraded with funding from the NSF-MRI ( DMR 0420532 ) and ONR-DURIP ( N00014-0400798 , N00014-0610539 , N00014-0910781 ) programs. NUCAPT is a Shared Facility of the Materials Research Center of Northwestern University, supported by the National Science Foundation’s MRSEC program ( DMR-1121262 ). We are grateful to the Initiative for Sustainability and Energy at Northwestern for Grants to upgrade NUCAPT’s capabilities. This work was also supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Program , under contract DE-AC02-06CH11357 .
Keywords
- Atom-probe tomography
- Boron oxide
- Lubricant
- Transmission electron microscopy
- Tribofilm
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys