Nanoparticles of Zn and ZnO as extreme pressure (EP) additives for lubricants

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Jose Taha Tijerina
Flavio Castillo
Javier Leal
Laura Peña Parás
Demófilo Maldonado Cortés
Celso Cruz
Gerardo Garza García
Patricio García

Abstract

The tribological behavior of moving components and tooling in the automotive industry is a critical issue for improving tool life and increasing efficiency. This work discusses the effects of Zn and ZnO nanoparticle additives homogeneously dispersed within a metal-forming synthetic fluid at various filler fractions: 0.01, 0.05 and 0.10wt.%. Nanolubricants were evaluated under scuffing conditions at extreme pressures (EP) conditions using a four-ball tribotester in order to obtain the load-carrying capacity (poz) behavior, and overall tribological characteristics. This method has shown, with great precision, the influence of the nanofillers on the EP behavior of conventional lubricants. Worn surfaces were characterized through Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) to determine the tribological mechanisms of nanoparticles. An Alicona 3D surface measuring system was used for measuring the surface roughness of the wear scars. Both nanoparticles exhibited better friction-reducing and anti-wear properties compared to the base synthetic fluid. For Zn-based nanolubricants, an enhancement of ~180% in poz was obtained with 0.10wt.%, showing the effect of the spherical nanostructures that were tribosintered onto the surface due to the EPs of the test. Furthermore, the highest enhancement in poz (up to 250%) was achieved with incorporation of 0.10wt.% of ZnO demonstrating the potential of nanolubricants for improving the efficiency of mechanical components.

 

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How to Cite
Tijerina, J., Castillo, F., Leal, J., Parás, L., Cortés, D., Cruz, C., García, G., & García, P. (2019). Nanoparticles of Zn and ZnO as extreme pressure (EP) additives for lubricants. Journal of Applied Research and Technology, 16(5). https://doi.org/10.22201/icat.16656423.2018.16.5.741
Author Biographies

Jose Taha Tijerina

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Flavio Castillo

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Javier Leal

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Laura Peña Parás

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Demófilo Maldonado Cortés

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Celso Cruz

Dynamical System Department, Centro de Ingeniería y Desarrollo Industrial, Querétaro, 76125, México

Gerardo Garza García

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico

Patricio García

Departamento de Ingeniería, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., San Pedro Garza García, 66238, Mexico