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Catalytically Active Oil-based Lubricant Additives Enabled by Calcining Ni-Al Layered Double Hydroxides
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. State Key Laboratory of Tribology, Tsinghua University, Beijing, China. Applied Materials Division, Argonne National Laboratory, Argonne, Illinois, United States..
State Key Laboratory of Tribology, Tsinghua University, Beijing, China. .
X-ray Science Division, Argonne National Laboratory, Argonne, Illinois, United States .
Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois, United States.
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2020 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 11, p. 113-120Article in journal (Refereed) Published
Abstract [en]

Layered double hydroxides (LDHs) have lately been hailed as robust lubricant additives for improving tribological properties and as ideal catalysts for synthesizing carbon-based nanomaterials. In this paper, in situ analytical tools are used to track the evolution of the crystal structure and chemical composition of LDHs during calcination. Nickel oxide and elemental nickel can be produced by calcining NiAl-LDH in air (LDH-C-Air) and argon (LDH-C-Ar), respectively. For the base oil with 1 wt % LDH-C-Air, negligible wear can be detected even after a 2 h friction test under a severe contact pressure (∼637 MPa). A relatively thick tribofilm (∼60 nm) with a better mechanical property is formed, which protects the solid surface from severe wear. In addition, the possible formed carbon debris may also prevent the direct collision of asperities and effectively improve the wear resistance. This work provides a unique vision for the application of calcined LDHs with the combination of catalysis and tribology.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2020. Vol. 11, p. 113-120
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-77248DOI: 10.1021/acs.jpclett.9b03094OAI: oai:DiVA.org:ltu-77248DiVA, id: diva2:1381599
Note

Validerad;2020;Nivå 2;2019-12-23 (svasva)

Available from: 2019-12-23 Created: 2019-12-23 Last updated: 2019-12-23Bibliographically approved

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Wang, HongdongShi, Yijun

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