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| Hauptverfasser: | , , , , , |
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| Format: | Artículo Open Access |
| Veröffentlicht: |
Wiley
2025
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| Schlagworte: | |
| Online-Zugang: | https://onlinelibrary.wiley.com/doi/10.1002/ls.70004 |
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Inhaltsangabe:
- Potential Application of Oil‐Soluble LaF3 Nanoparticles as High‐Performance Gear Oil Additives Tao Wu Shuguang Fan Ningning Song Chuanping Gao Shengmao Zhang Yujuan Zhang Lubrication Science ABSTRACTThis study aims to explore the potential application of LaF3 nanoparticles as high‐performance gear oil additives. Lanthanum trifluoride nanoparticles modified by di(2‐ethylhexyl) phosphoric acid (D2EHPA) [denoted as LaF3‐D2EHPA], which exhibited excellent dispersion stability, were prepared using a liquid‐phase chemical method. The tribological properties of LaF3‐D2EHPA nanoparticles in weakly polar mineral base oil (150 N), polyalphaolefin (PAO6), and strongly polar synthetic ester oil diisooctyl sebacate (DIOS) were investigated using a four‐ball friction and wear tester. In combination with the adsorption experiments using a dissipative quartz crystal microbalance (QCM‐D), the compatibility and action mechanisms of LaF3‐D2EHPA nanoparticles with extreme‐pressure and anti‐wear additives for typical gear oils were further investigated. The results indicate that when the mass fraction of LaF3‐D2EHPA nanoparticles is 0.2%, the tribological properties of all three base oils are improved to the greatest extent. When LaF3‐D2EHPA nanoparticles are mixed with gear oil additives T321 (sulfurized isobutylene) and T307 (ammonium thiophosphate), they exhibit high film‐forming rates and anti‐wear properties, forming a boundary lubricating film on the worn surface. This film consists of a tribochemical reaction film containing sulfur and phosphorus, as well as LaF3‐D2EHPA nanoparticles that have been deposited. 10.1002/ls.70004 http://onlinelibrary.wiley.com/termsAndConditions#vor