Insight into high temperature performance of magnetron sputtered Si-Ta-C-(N) coatings with an ion-implanted interlayer
Insight into high temperature performance of magnetron sputtered Si-Ta-C-(N) coatings with an ion-implanted interlayer
Challenges related to the application of wear resistant coatings at high temperatures require the development of novel materials with an exceptional combination of mechanical, chemical and tribological properties. The present paper is focused on understanding of relationships between structure, composition and high-temperature performance of the Si-Ta-C-(N) coatings. The coatings were produced using combined magnetron sputtering (MS) and ion implantation (CMSII) technique. It was found that ion implanted coatings demonstrated better thermal shock resistance compared to MS Si-Ta-C-(N) coatings. The Si-Ta-C-(N) coatings revealed a nanocomposite structure consisting of 2–3 nm fcc TaC(N) grains and amorphous a-Si and a-SiC(N) phases. The composition and structure of amorphous matrix and nanocrystallites strongly affected tribological performance of the Si-Ta-C-(N) coatings. The N-doped coatings exhibited exceptionally good tribological performance due to a higher ductility of N-rich amorphous a-SiCN and a-SiNx matrix, and fcc Ta(C,N)-based crystallites compared with the a-Si + a-SiC, and fcc TaC-based phases in N-free coating. The Si-Ta-C-(N) coatings easily withstood oxidation annealing at 800 °C due to the formation of a 200 nm protective TaSiOx amorphous layer. Oxidation annealings revealed that under thin protective TaSiOx layer crystalline components of coatings did not change when Si and C from the amorphous matrix started to diffuse towards the substrate at 800 °C but even after redistribution of elements and formation of oxide scale the coatings demonstrated reasonably high hardness – 13–16 GPa. Triboactivated formation of TaSiOx fibers which could slide/roll against the same TaSiOx tribolayer during high-temperature tribotests resulted in low coefficient of friction values (0.23 at 800 °C) and absence of wear.
High-temperature tribology, Magnetron sputtering, Microstructure, Nanocomposite coatings, Oxidation resistance
Bondarev, A. V.
013f7328-8e72-4cf4-b369-bcaa8d5a1648
Antonyuk, M. N.
ac676982-63bd-4cc8-8054-c3c6f7c9be4f
Kiryukhantsev-Korneev, Ph V.
2b49be4d-ccbe-42ee-9a5f-f3417f397dd3
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Shtansky, D. V.
b0aebbbb-2613-47f3-a825-b811454f634e
1 March 2021
Bondarev, A. V.
013f7328-8e72-4cf4-b369-bcaa8d5a1648
Antonyuk, M. N.
ac676982-63bd-4cc8-8054-c3c6f7c9be4f
Kiryukhantsev-Korneev, Ph V.
2b49be4d-ccbe-42ee-9a5f-f3417f397dd3
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Shtansky, D. V.
b0aebbbb-2613-47f3-a825-b811454f634e
Bondarev, A. V., Antonyuk, M. N., Kiryukhantsev-Korneev, Ph V., Polcar, T. and Shtansky, D. V.
(2021)
Insight into high temperature performance of magnetron sputtered Si-Ta-C-(N) coatings with an ion-implanted interlayer.
Applied Surface Science, 541, [148526].
(doi:10.1016/j.apsusc.2020.148526).
Abstract
Challenges related to the application of wear resistant coatings at high temperatures require the development of novel materials with an exceptional combination of mechanical, chemical and tribological properties. The present paper is focused on understanding of relationships between structure, composition and high-temperature performance of the Si-Ta-C-(N) coatings. The coatings were produced using combined magnetron sputtering (MS) and ion implantation (CMSII) technique. It was found that ion implanted coatings demonstrated better thermal shock resistance compared to MS Si-Ta-C-(N) coatings. The Si-Ta-C-(N) coatings revealed a nanocomposite structure consisting of 2–3 nm fcc TaC(N) grains and amorphous a-Si and a-SiC(N) phases. The composition and structure of amorphous matrix and nanocrystallites strongly affected tribological performance of the Si-Ta-C-(N) coatings. The N-doped coatings exhibited exceptionally good tribological performance due to a higher ductility of N-rich amorphous a-SiCN and a-SiNx matrix, and fcc Ta(C,N)-based crystallites compared with the a-Si + a-SiC, and fcc TaC-based phases in N-free coating. The Si-Ta-C-(N) coatings easily withstood oxidation annealing at 800 °C due to the formation of a 200 nm protective TaSiOx amorphous layer. Oxidation annealings revealed that under thin protective TaSiOx layer crystalline components of coatings did not change when Si and C from the amorphous matrix started to diffuse towards the substrate at 800 °C but even after redistribution of elements and formation of oxide scale the coatings demonstrated reasonably high hardness – 13–16 GPa. Triboactivated formation of TaSiOx fibers which could slide/roll against the same TaSiOx tribolayer during high-temperature tribotests resulted in low coefficient of friction values (0.23 at 800 °C) and absence of wear.
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More information
Accepted/In Press date: 17 November 2020
e-pub ahead of print date: 21 November 2020
Published date: 1 March 2021
Additional Information:
Funding Information:
A.V.B. and T.P. acknowledge support from the project OPVVV “Novel nanostructures for engineering applications” No. CZ.02.1.01/0.0/0.0/16_026/0008396. and CzechNanoLab Research Infrastructure supported by MEYS CR (LM2018110) (in the part of structural and mechanical characterizations). Ph.V.K.-K. acknowledges the financial support from the Russian Science Foundation, project 19-19-00117 (in the part of coating fabrication and evaluation their high-temperature properties).
Funding Information:
A.V.B. and T.P. acknowledge support from the project OPVVV ?Novel nanostructures for engineering applications? No. CZ.02.1.01/0.0/0.0/16_026/0008396. and CzechNanoLab Research Infrastructure supported by MEYS CR (LM2018110) (in the part of structural and mechanical characterizations). Ph.V.K.-K. acknowledges the financial support from the Russian Science Foundation, project 19-19-00117 (in the part of coating fabrication and evaluation their high-temperature properties).
Publisher Copyright:
© 2020 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords:
High-temperature tribology, Magnetron sputtering, Microstructure, Nanocomposite coatings, Oxidation resistance
Identifiers
Local EPrints ID: 454538
URI: http://eprints.soton.ac.uk/id/eprint/454538
ISSN: 0169-4332
PURE UUID: 7fe80c6d-efe4-4a4c-88c4-c26a1f8ac65d
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Date deposited: 15 Feb 2022 17:43
Last modified: 06 Jun 2024 01:49
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Contributors
Author:
A. V. Bondarev
Author:
M. N. Antonyuk
Author:
Ph V. Kiryukhantsev-Korneev
Author:
D. V. Shtansky
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