A comparison of tribological properties of nanolubricants containing carbon nanotori and additional additives

Estefany Tovar Sifuentes, Oxana V. Kharissova, Demófilo Maldonado-Cortés, Laura Peña-Parás, Remigiusz Michalczewski, Boris I. Kharisov

Resultado de la investigaciónrevisión exhaustiva

Resumen

This work presents the effects of five inorganic nanoparticles as additives, i.e., CNp (carbon nanotori particles), TiO2, MoS2, MoO3, and HcNT (halloysite clay nanotubes), in three different lubricants (oil-based, grease, and water-based). Nanolubricants were prepared by adding 1 wt% particles into each type of lubricant. Tribological properties of nanolubricants were determined and compared under anti-wear (AW) and extreme pressure (EP) conditions. CNp showed a decrease in coefficient of friction (COF) by 22% when added to water-based lubricant. Additionally, CNp demonstrated an improvement in limiting pressure of seizure (poz) of 74%, 52%, and 1621% for oil-based lubricant, grease, and water-based lubricant, respectively. Comparing 1 wt% CNp added to water-based lubricant with oil-based lubricant and grease, the improvements become outstanding under EP conditions. An increase in poz by 2479% compared to oil-based lubricant, and 789% compared to grease, was observed. In addition, a decrease of 66–69% in average wear scar diameter (AWSD) was obtained in comparison to oil-based lubricant and grease. Tribological mechanisms of carbon nanotori provide a rolling/sliding effect under AW conditions, and a load-bearing effect under EP conditions.

Idioma originalEnglish
Número de artículo124973
PublicaciónMaterials Chemistry and Physics
Volumen272
DOI
EstadoPublished - 1 nov 2021

Nota bibliográfica

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Ciencia de los materiales (todo)
  • Física de la materia condensada

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