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Journal of Materials Engineering and Performance
Published in: Journal of Materials Engineering and Performance 5/2022

20-01-2022 | Technical Article

Mechanical and Tribological Properties of NbAl, NbAlN, and NbAIN-CH Coatings Deposited using Various Niobium Target Currents and Acetylene Flow Rates

Authors: Y. L. Su, W. H. Kao, K. H. Sung

Published in: Journal of Materials Engineering and Performance | Issue 5/2022

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Abstract

Nb, NbXAl, NbXAlN and Nb2AlN-CHX coatings (where x indicates the niobium target current or acetylene flow rate) were deposited on SKH51 substrates using a radio frequency unbalanced magnetron sputtering system. The addition of Al and N to the Nb coating decreased the cluster size and prompted a solid solution strengthening effect, which improved the hardness, hardness/elastic modulus (H/E) ratio, adhesion strength and tribological properties. Among all the Nb, NbXAl and NbXAlN coatings, the Nb2AlN coating showed the best hardness (34.5 GPa), adhesion strength (Lc > 100 N) and tribological properties. Nb2AlN coatings were thus deposited with acetylene fluxes of 6 to 18 sccm. Acetylene addition prompted a change in the coating structure from metal nitride crystalline to diamond-like carbon. The Nb2AlN-CH12 coating showed a high H/E value of 0.094 and produced a carbon-rich transfer layer, which provided a solid lubricant effect at the contact interface during sliding. Consequently, the Nb2AlN-CH12 coating exhibited the best tribological performance among all the tested coatings.
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Metadata
Title
Mechanical and Tribological Properties of NbAl, NbAlN, and NbAIN-CH Coatings Deposited using Various Niobium Target Currents and Acetylene Flow Rates
Authors
Y. L. Su
W. H. Kao
K. H. Sung
Publication date
20-01-2022
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 5/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-021-06526-1

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