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Microstructure and phase composition of the Ag-Al film wear track: Through-thickness characterization by advanced electron microscopy
AGH Univ Sci & Technol, Int Ctr Electron Microscopy Mat Sci, Comp Sci, Al Mickiewicza 30, PL-30059 Krakow, Poland;AGH Univ Sci & Technol, Fac Met Engn & Ind, Comp Sci, Al Mickiewicza 30, PL-30059 Krakow, Poland.
AGH Univ Sci & Technol, Int Ctr Electron Microscopy Mat Sci, Comp Sci, Al Mickiewicza 30, PL-30059 Krakow, Poland;AGH Univ Sci & Technol, Fac Met Engn & Ind, Comp Sci, Al Mickiewicza 30, PL-30059 Krakow, Poland.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry. Corp Res, Insulat & Mat Technol, Abb Ab, Vasteras, Sweden.
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2019 (English)In: Archives of Metallurgy and Materials, ISSN 1733-3490, E-ISSN 2300-1909, Vol. 64, no 1, p. 251-256Article in journal (Refereed) Published
Abstract [en]

Analytical transmission electron microscopy has been applied to characterize the microstructure, phase and chemical composition of the Ag-Al wear track throughout its thickness down to the atomic level. Microscopy findings have been correlated with Ag-Al film tribological properties to understand the effect of the hexagonal solid solution phase on the tribological properties of this film. Ag-25Al (at.%) films have been produced by simultaneous magnetron sputtering of components in Ar atmosphere under 1 mTorr pressure and subjected to pin-on-disc tribological tests. It has been shown that hcp phase with (001) planes aligned parallel to the film surface dominates both in as-deposited and in tribofilm areas of the Ag-Al alloy film. Possible mechanisms of reduced friction in easily oxidized Ag-Al system are discussed and the mechanism based on readily shearing basal planes of the hcp phase is considered as the most probable one.

Place, publisher, year, edition, pages
POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS , 2019. Vol. 64, no 1, p. 251-256
Keywords [en]
Ag-Al alloy, TEM, EDX, hexagonal phase, electrical contact
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-381213DOI: 10.24425/amm.2019.126245ISI: 000461713400036OAI: oai:DiVA.org:uu-381213DiVA, id: diva2:1303194
Available from: 2019-04-09 Created: 2019-04-09 Last updated: 2019-04-09Bibliographically approved

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Mao, FangTaher, MamounJansson, Ulf

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