Tribological characteristics of monodispersed cerium borate nanospheres in biodegradable rapeseed oil lubricant
| Autor: | Chen Boshui, Zhang Nan, Fang Jianhua, Wu Jiang, Wang Jiu, GU Ke-Cheng |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Scanning electron microscope Composite number General Physics and Astronomy chemistry.chemical_element Infrared spectroscopy Nanoparticle Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films Cerium chemistry Chemical engineering Lubrication Particle size Lubricant Composite material |
| Zdroj: | Applied Surface Science. 353:326-332 |
| ISSN: | 0169-4332 |
| Popis: | Stearic acid-capped cerium borate composite nanoparticles, abbreviated as SA/CeBO3, were prepared by hydrothermal method. The morphologies, element compositions, size distributions, crystal and chemical structures, hydrophobic characteristics, of SA/CeBO3 were characterized by scanning electron microscope, energy dispersive X-ray spectrometer, dynamic laser particle size analyzer, X-ray diffraction, and Fourier transform infrared spectrometer, respectively. The friction and wear performances of SA/CeBO3 as a lubricating additive in a rapeseed oil were evaluated on a four-ball tribo-tester. The tribochemical characteristics of the worn surfaces were investigated by X-ray photoelectron spectroscopy. The results showed that the hydrophobic SA/CeBO3 were monodispersed nanospheres with an average diameter of 8 nm, and exhibited excellent dispersing stability in rapeseed oil. Meanwhile, SA/CeBO3 nanospheres were outstanding in enhancing friction-reducing and anti-wear capacities of rapeseed oil. The prominent tribological performances of SA/CeBO3 in rapeseed oil were attributed to the formation of a composite boundary lubrication film mainly composed of lubricous tribochemical species of B2O3, CeO2 and Fe2O3, and the adsorbates of SA/CeBO3 and rapeseed oil, on the tribo-surfaces. |
| Databáze: | OpenAIRE |
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