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Reprint of: Improving oxidation and wear resistance of TiB2 films by nano-multilayering with Cr*
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Guangdong Univ Technol, Peoples R China.
Guangdong Univ Technol, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Univ Illinois, IL 61801 USA; Natl Taiwan Univ Sci & Technol, Taiwan.ORCID iD: 0000-0002-2955-4897
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2022 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 442, article id 128602Article in journal (Refereed) Published
Abstract [en]

Alternating TiB2-DCMS and Cr-HiPIMS layers are used to fabricate TiB2/Cr multilayer films with varying the Cr interlayer thickness, 2 and 5 nm, and the substrate bias during growth of Cr interlayers from floating, to -60 V and -200 V. The effects of multilayer structure on mechanical properties, static oxidation, and tribological behavior of the TiB2/Cr multilayers are investigated. The results reveal that TiB2 nanocolumns renucleate at each Cr interface maintaining smooth film surface and film density. Interlaying with Cr with thicknesses of 2-5 nm improves the resistance to oxidation at 500-600 degrees C as compared to TiB2 monolayer. The increase of the thickness of the Cr interlayers from 2 to 5 nm decreases the hardness of the multilayer slightly but deteriorates the wear rate significantly. The friction coefficients at 500 degrees C are lower than those at RT due to boric acid liquid lubrication induced by surface oxidation. The TiB2/Cr multilayer films show higher wear resistance than TiB2 monolayer. The multilayer films with 2 nm-thick Cr deposited at -60 V have the lowest recorded wear rates. Irradiation with 200 eV Cr+ leads to interface mixing, resulting in the formation of B-deficient TiBx phase (x < 2) and higher wear rates compared to multilayers grown at -60 V.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2022. Vol. 442, article id 128602
Keywords [en]
Cr; HiPIMS; Oxidation resistance; Wear resistance
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-187346DOI: 10.1016/j.surfcoat.2022.128602ISI: 000822854000002OAI: oai:DiVA.org:liu-187346DiVA, id: diva2:1688753
Note

Funding Agencies|Knut and Alice Wallenberg Foundation [KAW2016.0358]; VINN Excellence Center Functional Nanoscale Materials [2016-05156]; Swedish Energy Agency [51201-1]; Swedish Research Council [2018-03957]; VINNOVA [2018-04290]; Aforsk Foundation [16-359]; Carl Tryggers Stiftelse [CTS 17:166]; National Natural Science Foundation of China [51901048]; Natural Science Foundation of Guangdong Province [2019A1515012234]

Available from: 2022-08-19 Created: 2022-08-19 Last updated: 2022-08-19

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Wu, ZhengtaoBakhit, BabakPetrov, IvanHultman, LarsGreczynski, Grzegorz
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