Please use this identifier to cite or link to this item: doi:10.22028/D291-34203
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Title: Superior Wear-Resistance of Ti3C2Tx Multilayer Coatings
Author(s): Grützmacher, Philipp G.
Suarez Vallejo, Sebastian
Tolosa Rodriguez, Aura Monserrat
Gachot, Carsten
Song, Guichen
Wang, Bo
Presser, Volker
Mücklich, Frank
Anasori, Babak
Rosenkranz, Andreas
Language: English
Title: ACS nano
Volume: 15
Issue: 5
Startpage: 8216
Endpage: 8224
Publisher/Platform: ACS
Year of Publication: 2021
Publikation type: Journal Article
Abstract: Owing to MXenes' tunable mechanical properties induced by their structural and chemical diversity, MXenes are believed to compete with state-of-the-art 2D nanomaterials such as graphene regarding their tribological performance. Their nanolaminate structure offers weak interlayer interactions and an easy-to-shear ability to render them excellent candidates for solid lubrication. However, the acting friction and wear mechanisms are yet to be explored. To elucidate these mechanisms, 100-nm-thick homogeneous multilayer Ti3C2T x coatings are deposited on technologically relevant stainless steel by electrospraying. Using ball-on-disk tribometry (Si3N4 counterbody) with acting contact pressures of about 300 MPa, their long-term friction and wear performance under dry conditions are studied. MXene-coated specimens demonstrate a 6-fold friction reduction and an ultralow wear rate (4 × 10-9 mm3 N-1 m-1) over 100 000 sliding cycles, outperforming state-of-the-art 2D nanomaterials by at least 200% regarding their wear life. High-resolution characterization verified the formation of a beneficial tribolayer consisting of thermally/mechanically degraded MXenes and amorphous/nanocrystalline iron oxides. The transfer of this tribolayer to the counterbody transforms the initial steel/Si3N4 contact to tribolayer/tribolayer contact with low shear resistance. MXene pileups at the wear track's reversal points continuously supply the tribological contact with fresh, lubricious nanosheets, thus enabling an ultra-wear-resistant and low-friction performance.
DOI of the first publication: 10.1021/acsnano.1c01555
URL of the first publication:
Link to this record: hdl:20.500.11880/31405
ISSN: 1936-086X
Date of registration: 22-Jun-2021
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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