Room and high temperature tribological performance of multilayered tisin/tin and tisin/tin(Ag) coatings deposited by sputtering
Room and high temperature tribological performance of multilayered tisin/tin and tisin/tin(Ag) coatings deposited by sputtering
In this study, we compare the tribological performance of a multilayer TiSiN/Ti(Ag)N coating with a TiSiN/TiN coating with a similar Si content in order to demonstrate the effect of the solid lubricant phase, silver. For Al2 O3 balls, the hardness and reduced modulus determine the tribological performance of the coatings for tests conducted at room temperature (RT) against Al2 O3 balls. At 550◦ C, the TiSiN/TiN coating failed, whereas the Ag-containing coating performed better due to the presence of Ag in the contact, which decreased the shear stress and, consequently, the friction. For tests against TiAl6V4 balls, the Ag-containing coating was always better than the TiSiN/TiN one. At 550◦ C, Ag in the wear track prevented the adhesion of the oxidized Ti-alloy wear debris in the contact, favoring the adhesion of wear debris from the coating to both the coating and counterpart surfaces. No wear could be measured for the 700◦ C tests for both coatings due to different reasons: (i) the presence of oxidized adhered material from the ball to the reference TiSiN/TiN coating surface protected from wear and (ii) the presence of Ag-agglomerated particles decreased the friction and minimized the adhesion wear of the counterpart for the TiSiN/TiN(Ag) coating.
High-temperature tribology, TiSiN/TiN(Ag) coatings, Wear mechanisms, Wear resistance
Fernandes, Filipe
71711172-c26d-4204-9aa3-c1ae9acac554
Al-Rjoub, Abbas
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Cavaleiro, Diogo
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Polcar, Tomas
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Cavaleiro, Albano
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December 2020
Fernandes, Filipe
71711172-c26d-4204-9aa3-c1ae9acac554
Al-Rjoub, Abbas
3a0f079b-ecc4-4411-b697-a0b7fe603845
Cavaleiro, Diogo
bcf05ceb-1a51-426a-838f-af44692dc91c
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Cavaleiro, Albano
83fb0417-34af-4c14-b4b4-b9541e4fc652
Fernandes, Filipe, Al-Rjoub, Abbas, Cavaleiro, Diogo, Polcar, Tomas and Cavaleiro, Albano
(2020)
Room and high temperature tribological performance of multilayered tisin/tin and tisin/tin(Ag) coatings deposited by sputtering.
Coatings, 10 (12), [1191].
(doi:10.3390/coatings10121191).
Abstract
In this study, we compare the tribological performance of a multilayer TiSiN/Ti(Ag)N coating with a TiSiN/TiN coating with a similar Si content in order to demonstrate the effect of the solid lubricant phase, silver. For Al2 O3 balls, the hardness and reduced modulus determine the tribological performance of the coatings for tests conducted at room temperature (RT) against Al2 O3 balls. At 550◦ C, the TiSiN/TiN coating failed, whereas the Ag-containing coating performed better due to the presence of Ag in the contact, which decreased the shear stress and, consequently, the friction. For tests against TiAl6V4 balls, the Ag-containing coating was always better than the TiSiN/TiN one. At 550◦ C, Ag in the wear track prevented the adhesion of the oxidized Ti-alloy wear debris in the contact, favoring the adhesion of wear debris from the coating to both the coating and counterpart surfaces. No wear could be measured for the 700◦ C tests for both coatings due to different reasons: (i) the presence of oxidized adhered material from the ball to the reference TiSiN/TiN coating surface protected from wear and (ii) the presence of Ag-agglomerated particles decreased the friction and minimized the adhesion wear of the counterpart for the TiSiN/TiN(Ag) coating.
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coatings-10-01191
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Published date: December 2020
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Funding Information:
Funding: This research is sponsored by FEDER funds through the program COMPETE—Programa Operacional Factores de Competitividade—and by national funds through FCT—Fundação para a Ciência e a Tecnologia—under the projects: CEMMPRE—ref. “UIDB/00285/2020”, SMARTLUB—ref. “POCI-01-0145-FEDER-031807”, CONTROLLUB—UT Austin Portugal Program ref. “UTAP-EXPL/NTec/0107/2017” and MCTool21 “POCI-01-0247-FEDER-045940”. This research was also supported by the projects CZ.02.2.69/0.0/0.0/18_070/ 0010457 and CZ.02.1.01/0.0/0.0/16_026/0008396.
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords:
High-temperature tribology, TiSiN/TiN(Ag) coatings, Wear mechanisms, Wear resistance
Identifiers
Local EPrints ID: 453995
URI: http://eprints.soton.ac.uk/id/eprint/453995
ISSN: 2079-6412
PURE UUID: 5f146f8e-fe2f-440f-8c02-e9e709d10a86
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Date deposited: 27 Jan 2022 18:09
Last modified: 18 Mar 2024 03:19
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Author:
Filipe Fernandes
Author:
Abbas Al-Rjoub
Author:
Diogo Cavaleiro
Author:
Albano Cavaleiro
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