Enhancement of tribological properties of greases for circuit breakers

Brenda Castaños, Cecilia Fernández, Laura Peña-Parás, Demófilo Maldonado-Cortés, Juan Rodríguez-Salinas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Greases are essential in the electrical industry for the purpose of minimizing wear and coefficient of friction (COF) between the components of circuit breakers. Nowadays some researchers have explored the addition of nanoparticles to enhance their tribological properties. In this study, tribological tests were performed on different greases employed for the electrical industry. CuO and ZnO nanoparticles were homogeneously dispersed into the greases, varying their concentration (0.01 wt.%, 0.05 wt.%, and 0.10 wt.%). A four-ball tribotest, according to ASTM D-2266, and a ball-on-disk tribotest, according to ASTM G-99, were performed in order to analyze the wear scar diameter (WSD), COF, wear mass loss and worn area. The worn materials were characterized with an optical 3D profilometer measurement system. Anti-wear properties were enhanced up to 29.30% for the lithium complex grease (LG) with no nanoparticles added, in comparison with the aluminum complex grease (AG), providing a much better tribological performance; in the ball-on-disk tribotests, a 72.80% and a 15.74% reduction in the mass loss and COF were achieved, respectively. The addition of nanoparticles was found to provide improvements of 5.31% in WSD for the AG grease and 34.49% in COF for the LG grease. A pilot test was performed following the security test UL489, achieving a reduction of 45.17% in the worn area achieved by LG grease compared to AG grease.

Original languageEnglish
Title of host publicationInternational Materials Research Congress XXVII
Pages3979-3985
Number of pages7
Volume3
Edition64
DOIs
Publication statusPublished - 12 Nov 2018

Publication series

NameMRS Advances
PublisherMaterials Research Society
ISSN (Print)2059-8521

Fingerprint

greases
circuit breakers
Electric circuit breakers
Lubricating greases
augmentation
coefficient of friction
Wear of materials
Aluminum
Lithium
Friction
Nanoparticles
balls
nanoparticles
scars
lithium
aluminum
test pilots
industries
profilometers
Industry

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Castaños, B., Fernández, C., Peña-Parás, L., Maldonado-Cortés, D., & Rodríguez-Salinas, J. (2018). Enhancement of tribological properties of greases for circuit breakers. In International Materials Research Congress XXVII (64 ed., Vol. 3, pp. 3979-3985). (MRS Advances). https://doi.org/10.1557/adv.2018.610
Castaños, Brenda ; Fernández, Cecilia ; Peña-Parás, Laura ; Maldonado-Cortés, Demófilo ; Rodríguez-Salinas, Juan. / Enhancement of tribological properties of greases for circuit breakers. International Materials Research Congress XXVII. Vol. 3 64. ed. 2018. pp. 3979-3985 (MRS Advances).
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abstract = "Greases are essential in the electrical industry for the purpose of minimizing wear and coefficient of friction (COF) between the components of circuit breakers. Nowadays some researchers have explored the addition of nanoparticles to enhance their tribological properties. In this study, tribological tests were performed on different greases employed for the electrical industry. CuO and ZnO nanoparticles were homogeneously dispersed into the greases, varying their concentration (0.01 wt.{\%}, 0.05 wt.{\%}, and 0.10 wt.{\%}). A four-ball tribotest, according to ASTM D-2266, and a ball-on-disk tribotest, according to ASTM G-99, were performed in order to analyze the wear scar diameter (WSD), COF, wear mass loss and worn area. The worn materials were characterized with an optical 3D profilometer measurement system. Anti-wear properties were enhanced up to 29.30{\%} for the lithium complex grease (LG) with no nanoparticles added, in comparison with the aluminum complex grease (AG), providing a much better tribological performance; in the ball-on-disk tribotests, a 72.80{\%} and a 15.74{\%} reduction in the mass loss and COF were achieved, respectively. The addition of nanoparticles was found to provide improvements of 5.31{\%} in WSD for the AG grease and 34.49{\%} in COF for the LG grease. A pilot test was performed following the security test UL489, achieving a reduction of 45.17{\%} in the worn area achieved by LG grease compared to AG grease.",
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Castaños, B, Fernández, C, Peña-Parás, L, Maldonado-Cortés, D & Rodríguez-Salinas, J 2018, Enhancement of tribological properties of greases for circuit breakers. in International Materials Research Congress XXVII. 64 edn, vol. 3, MRS Advances, pp. 3979-3985. https://doi.org/10.1557/adv.2018.610

Enhancement of tribological properties of greases for circuit breakers. / Castaños, Brenda; Fernández, Cecilia; Peña-Parás, Laura; Maldonado-Cortés, Demófilo; Rodríguez-Salinas, Juan.

International Materials Research Congress XXVII. Vol. 3 64. ed. 2018. p. 3979-3985 (MRS Advances).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Castaños B, Fernández C, Peña-Parás L, Maldonado-Cortés D, Rodríguez-Salinas J. Enhancement of tribological properties of greases for circuit breakers. In International Materials Research Congress XXVII. 64 ed. Vol. 3. 2018. p. 3979-3985. (MRS Advances). https://doi.org/10.1557/adv.2018.610