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Microstructure, mechanical and tribological properties of Ta(C, N) coatings deposited on TA15 substrates with different nitrogen partial pressure

Yaoyao Ma (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Qiang Miao (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Wenping Liang (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Haiyang Yu (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Mengjuan Yin (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Kai Zang (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Xueqing Pang (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Xianfeng Wang (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 29 November 2022

Issue publication date: 2 January 2023

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Abstract

Purpose

The purpose of this paper is to obtain the optimal N2/Ar ratio parameters for preparing Ta (C, N) coating. Three coatings with different N2/Ar ratios were prepared on the TA15 substrate, and their effects on the wear properties of the coatings were discussed.

Design/methodology/approach

Ta(C, N) coatings with three different N2/Ar ratios were prepared on TA15 substrates using the double cathode glow metallurgical plasma alloying technique (DGMPA) using a step-by-step diffusion method.

Findings

With the increase of N2/Ar flow ratio, the hardness and elastic modulus of the coating first increase and then decrease. Compared with the S1 sample (N2/Ar gas ratio 25: 75) and the S3 sample (N2/Ar gas ratio 75: 25), the S2 sample (N2/Ar gas ratio 50: 50) has better mechanical properties, with hardness increased by 48.45% and 6.8%, respectively, and elastic strain ratio increased by 22.8% and 28.5%, respectively. Moreover, the wear degree of the S2 sample is less than other samples. The wear rate of the S2 sample was 32.4% lower than the S3 sample at 300°C and 14.3% lower than the S3 sample at 500°C. Therefore, the S2 sample has the best mechanical properties and the best high temperature wear resistance.

Originality/value

Ta(C, N) coatings were prepared by DGMPA technology, and the wear mechanism of Ta(C, N) coatings with different N2/Ar ratios was investigated to reduce the wear rate.

Keywords

Acknowledgements

The Fundamental Research Funds for the Central Universities, NO.NP2022444 and the National Major Science and Technology Projects of China (2017-IV-00-05-0042).

Citation

Ma, Y., Miao, Q., Liang, W., Yu, H., Yin, M., Zang, K., Pang, X. and Wang, X. (2023), "Microstructure, mechanical and tribological properties of Ta(C, N) coatings deposited on TA15 substrates with different nitrogen partial pressure", Industrial Lubrication and Tribology, Vol. 75 No. 1, pp. 110-117. https://doi.org/10.1108/ILT-08-2022-0245

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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