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Volume 12
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10.3390/coatings12040547
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Article

High-Temperature Oxidation Resistance and Tribological Properties of Al2O3/ta-C Coating

by
Asad Alamgir
1,*,
Andrei Bogatov
1,
Taivo Jõgiaas
2,
Mart Viljus
1,
Taavi Raadik
3,
Jakob Kübarsepp
1,
Fjodor Sergejev
1,
Andreas Lümkemann
4,
Jan Kluson
5 and
Vitali Podgursky
1
1
Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
2
Institute of Physic, University of Tartu, W. Ostwaldi 1, 50411 Tartu, Estonia
3
Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
4
PLATIT AG, Eichholzstrasse 9, CH-2545 Selzach, Switzerland
5
PLATIT A.S., Prumyslova 3020/3, CZ-787 01 Sumperk, Czech Republic
*
Author to whom correspondence should be addressed.
Coatings 2022, 12(4), 547; https://doi.org/10.3390/coatings12040547
Submission received: 10 March 2022 / Revised: 6 April 2022 / Accepted: 15 April 2022 / Published: 18 April 2022
(This article belongs to the Special Issue Tribological Studies on Diamond, DLC and Ta-C Coatings)
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Abstract

The focus is on the oxidation resistance and tribological performance of ta-C and Al2O3/ta-C coatings. The wear tests were carried out on the ball on disc tribometer at room (25 °C) and high (400, 450 and 500 °C) temperatures in ambient air with Si3N4 balls as counterbodies. Scanning electron microscopy and Raman spectroscopy were used to analyze the surface morphology and chemical bonding, respectively. The Al2O3/ta-C coating exhibited better oxidation resistance and tribological performance at elevated temperatures than the ta-C coating. The Raman analysis revealed that a thin alumina layer suppresses structural changes in the ta-C coating at elevated temperatures, thus preserving the sp3 content.
Keywords: ta-C coating; oxidation resistance; tribology; high temperature ta-C coating; oxidation resistance; tribology; high temperature

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MDPI and ACS Style

Alamgir, A.; Bogatov, A.; Jõgiaas, T.; Viljus, M.; Raadik, T.; Kübarsepp, J.; Sergejev, F.; Lümkemann, A.; Kluson, J.; Podgursky, V. High-Temperature Oxidation Resistance and Tribological Properties of Al2O3/ta-C Coating. Coatings 2022, 12, 547. https://doi.org/10.3390/coatings12040547

AMA Style

Alamgir A, Bogatov A, Jõgiaas T, Viljus M, Raadik T, Kübarsepp J, Sergejev F, Lümkemann A, Kluson J, Podgursky V. High-Temperature Oxidation Resistance and Tribological Properties of Al2O3/ta-C Coating. Coatings. 2022; 12(4):547. https://doi.org/10.3390/coatings12040547

Chicago/Turabian Style

Alamgir, Asad, Andrei Bogatov, Taivo Jõgiaas, Mart Viljus, Taavi Raadik, Jakob Kübarsepp, Fjodor Sergejev, Andreas Lümkemann, Jan Kluson, and Vitali Podgursky. 2022. "High-Temperature Oxidation Resistance and Tribological Properties of Al2O3/ta-C Coating" Coatings 12, no. 4: 547. https://doi.org/10.3390/coatings12040547

APA Style

Alamgir, A., Bogatov, A., Jõgiaas, T., Viljus, M., Raadik, T., Kübarsepp, J., Sergejev, F., Lümkemann, A., Kluson, J., & Podgursky, V. (2022). High-Temperature Oxidation Resistance and Tribological Properties of Al2O3/ta-C Coating. Coatings, 12(4), 547. https://doi.org/10.3390/coatings12040547

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