Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions

The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 wt% MoS<sub>2</sub>, together with several other commercial greases such as calcium, lithium, were studied. The test results showed a marked reduction of f...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Adolfo Senatore, Haiping Hong, Veronica D’Urso, Hammad Younes
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	grease PAO CNTs wear coefficient of friction tribological behavior Science Q
Acceso en línea:	https://doaj.org/article/3ece13c9bce14cbc83b1dc4f93c63b0b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3ece13c9bce14cbc83b1dc4f93c63b0b
record_format	dspace
spelling	oai:doaj.org-article:3ece13c9bce14cbc83b1dc4f93c63b0b2021-11-25T18:11:53ZTribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions10.3390/lubricants91101072075-4442https://doaj.org/article/3ece13c9bce14cbc83b1dc4f93c63b0b2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4442/9/11/107https://doaj.org/toc/2075-4442The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 wt% MoS<sub>2</sub>, together with several other commercial greases such as calcium, lithium, were studied. The test results showed a marked reduction of frictional coefficient achieved by the CNTs based grease samples with an average benefit of around 30% compared to conventional greases. The steady state test under 1.00 GPa average contact pressure in a mixed lubrication regime and the fretting test showed the best results in terms of friction reduction obtained by CNTs greases. Steady state tests at higher average contact pressure of 1.67 GPa proved to have a lower friction coefficient for CNTs grease containing MoS<sub>2</sub>; otherwise CNTs grease without MoS<sub>2</sub> showed an average value of CoF comparable to calcium and lithium greases, both in a boundary and a mixed regime. The protection against wear, a considerable decrease (−60%) of reference parameter was measured with CNTs grease with MoS<sub>2</sub> (NLGI 2) in comparison with the worst conventional grease and −22% in comparison with the best conventional grease. The data indicated that our novel carbon nanotube greases show superior tribological properties and will have promising applications in the corresponding industry.Adolfo SenatoreHaiping HongVeronica D’UrsoHammad YounesMDPI AGarticlegreasePAOCNTswearcoefficient of frictiontribological behaviorScienceQENLubricants, Vol 9, Iss 107, p 107 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	grease PAO CNTs wear coefficient of friction tribological behavior Science Q
spellingShingle	grease PAO CNTs wear coefficient of friction tribological behavior Science Q Adolfo Senatore Haiping Hong Veronica D’Urso Hammad Younes Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
description	The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 wt% MoS<sub>2</sub>, together with several other commercial greases such as calcium, lithium, were studied. The test results showed a marked reduction of frictional coefficient achieved by the CNTs based grease samples with an average benefit of around 30% compared to conventional greases. The steady state test under 1.00 GPa average contact pressure in a mixed lubrication regime and the fretting test showed the best results in terms of friction reduction obtained by CNTs greases. Steady state tests at higher average contact pressure of 1.67 GPa proved to have a lower friction coefficient for CNTs grease containing MoS<sub>2</sub>; otherwise CNTs grease without MoS<sub>2</sub> showed an average value of CoF comparable to calcium and lithium greases, both in a boundary and a mixed regime. The protection against wear, a considerable decrease (−60%) of reference parameter was measured with CNTs grease with MoS<sub>2</sub> (NLGI 2) in comparison with the worst conventional grease and −22% in comparison with the best conventional grease. The data indicated that our novel carbon nanotube greases show superior tribological properties and will have promising applications in the corresponding industry.
format	article
author	Adolfo Senatore Haiping Hong Veronica D’Urso Hammad Younes
author_facet	Adolfo Senatore Haiping Hong Veronica D’Urso Hammad Younes
author_sort	Adolfo Senatore
title	Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
title_short	Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
title_full	Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
title_fullStr	Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
title_full_unstemmed	Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions
title_sort	tribological behavior of novel cnts-based lubricant grease in steady-state and fretting sliding conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3ece13c9bce14cbc83b1dc4f93c63b0b
work_keys_str_mv	AT adolfosenatore tribologicalbehaviorofnovelcntsbasedlubricantgreaseinsteadystateandfrettingslidingconditions AT haipinghong tribologicalbehaviorofnovelcntsbasedlubricantgreaseinsteadystateandfrettingslidingconditions AT veronicadurso tribologicalbehaviorofnovelcntsbasedlubricantgreaseinsteadystateandfrettingslidingconditions AT hammadyounes tribologicalbehaviorofnovelcntsbasedlubricantgreaseinsteadystateandfrettingslidingconditions
_version_	1718411493309939712

Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions

Ejemplares similares