Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating

Mo-W-C coatings with three different C/(Mo+W) ratios (5:1, 2.8:1 and 2.2:1) were deposited by using combined unbalanced magnetron sputtering (UBMS) and high-power impulse magnetron sputtering (HIPIMS) technology. The influence of the C/(Mo+W) ratio on coating microstructure and related tribological...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	Paranjayee Mandal
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	C/(Mo+W) ratio microstructure sliding friction abrasive wear tribo-chemical wear Raman analysis Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/f794bf336aa9482ead0cc32ab0d2b687
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f794bf336aa9482ead0cc32ab0d2b687
record_format	dspace
spelling	oai:doaj.org-article:f794bf336aa9482ead0cc32ab0d2b6872021-11-11T15:14:50ZInfluence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating10.3390/app1121101892076-3417https://doaj.org/article/f794bf336aa9482ead0cc32ab0d2b6872021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10189https://doaj.org/toc/2076-3417Mo-W-C coatings with three different C/(Mo+W) ratios (5:1, 2.8:1 and 2.2:1) were deposited by using combined unbalanced magnetron sputtering (UBMS) and high-power impulse magnetron sputtering (HIPIMS) technology. The influence of the C/(Mo+W) ratio on coating microstructure and related tribological properties at ambient temperature and at 200 °C were studied in lubricated condition (up to 7500 m and 1800 m of sliding distances, respectively). Results showed that a decrease in the C/(Mo+W) ratio could be correlated with an increase in coating thickness, adhesion strength, hardness and elastic modulus values, and a decrease in the degree of graphitization. At ambient temperature, outstanding tribological properties (very low friction and negligible wear) were observed irrespective of the C/(Mo+W) ratio. At 200 °C, low C/(Mo+W) ratios (2.8:1 and 2.2:1) were found particularly beneficial to achieve excellent tribological properties. The keys to significant friction reduction at 200 °C were (i) in situ formation of MoS<sub>2</sub> and WS<sub>2</sub> due to tribo-chemical reactions and (ii) presence of amorphous carbon debris particles in the protective tribolayer. With an increase in sliding distance, the tribolayer gradually lowered the friction coefficient by protecting both the coating and counterpart from severe wear. On the other hand, a high C/(Mo+W) ratio (5:1) led to low friction but noticeable abrasive wear at 200 °C.Paranjayee MandalMDPI AGarticleC/(Mo+W) ratiomicrostructuresliding frictionabrasive weartribo-chemical wearRaman analysisTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10189, p 10189 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	C/(Mo+W) ratio microstructure sliding friction abrasive wear tribo-chemical wear Raman analysis Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	C/(Mo+W) ratio microstructure sliding friction abrasive wear tribo-chemical wear Raman analysis Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Paranjayee Mandal Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
description	Mo-W-C coatings with three different C/(Mo+W) ratios (5:1, 2.8:1 and 2.2:1) were deposited by using combined unbalanced magnetron sputtering (UBMS) and high-power impulse magnetron sputtering (HIPIMS) technology. The influence of the C/(Mo+W) ratio on coating microstructure and related tribological properties at ambient temperature and at 200 °C were studied in lubricated condition (up to 7500 m and 1800 m of sliding distances, respectively). Results showed that a decrease in the C/(Mo+W) ratio could be correlated with an increase in coating thickness, adhesion strength, hardness and elastic modulus values, and a decrease in the degree of graphitization. At ambient temperature, outstanding tribological properties (very low friction and negligible wear) were observed irrespective of the C/(Mo+W) ratio. At 200 °C, low C/(Mo+W) ratios (2.8:1 and 2.2:1) were found particularly beneficial to achieve excellent tribological properties. The keys to significant friction reduction at 200 °C were (i) in situ formation of MoS<sub>2</sub> and WS<sub>2</sub> due to tribo-chemical reactions and (ii) presence of amorphous carbon debris particles in the protective tribolayer. With an increase in sliding distance, the tribolayer gradually lowered the friction coefficient by protecting both the coating and counterpart from severe wear. On the other hand, a high C/(Mo+W) ratio (5:1) led to low friction but noticeable abrasive wear at 200 °C.
format	article
author	Paranjayee Mandal
author_facet	Paranjayee Mandal
author_sort	Paranjayee Mandal
title	Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
title_short	Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
title_full	Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
title_fullStr	Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
title_full_unstemmed	Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating
title_sort	influence of carbon: metal ratio on tribological behavior of mo-w-c coating
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f794bf336aa9482ead0cc32ab0d2b687
work_keys_str_mv	AT paranjayeemandal influenceofcarbonmetalratioontribologicalbehaviorofmowccoating
_version_	1718436145595940864

Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating

Ejemplares similares