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Elemental distribution and fracture properties of magnetron sputtered carbon supersaturated tungsten films
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0002-8082-1671
Institute of Materials Science and Technology, TU Wien, Vienna, Austria.
Department of Physics, Chalmers University of Technology, Göteborg, Sweden.
Division of Applied Physical Chemistry, Department of Chemistry, KTH – Royal Institute of Technology, SE-100 44 Stockholm, Sweden; Institute Methods and Instrumentation for Synchrotron Radiation Research PS-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany; Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany.ORCID iD: 0000-0002-6471-1093
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2024 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 477, article id 130326Article in journal (Refereed) Published
Abstract [en]

The combination of strength and toughness is a major driving force for alloy design of protective coatings, and nanocrystalline tungsten (W)-alloys have shown to be promising candidates for combining strength and toughness. Here we investigate the elemental distribution and the fracture toughness of carbon (C) alloyed W thin films prepared by non-reactive magnetron sputtering. W:C films with up to ~4 at.% C crystallize in a body-centered-cubic structure with a strong 〈hh0〉texture, and no additional carbide phases are observed in the diffraction pattern. Atom probe tomography and X-ray photoelectron spectroscopy confirmed the formation of such a supersaturated solid solution. The pure W film has a hardness ~13 GPa and the W:C films exhibit a peak hardness of ~24 GPa. In-situ micromechanical cantilever bending tests show that the fracture toughness decreases from ~4.5 MPa·m1/2 for the W film to ~3.1 MPa·m1/2 for W:C films. The results show that C can significantly enhance the hardness of W thin films while retaining a high fracture toughness.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 477, article id 130326
Keywords [en]
PVD, Fracture toughness, Atom probe tomography, XPS, Tungsten
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-521828DOI: 10.1016/j.surfcoat.2023.130326ISI: 001149676000001OAI: oai:DiVA.org:uu-521828DiVA, id: diva2:1832187
Funder
Swedish Foundation for Strategic Research, RMA15-0048Available from: 2024-01-29 Created: 2024-01-29 Last updated: 2024-02-15Bibliographically approved

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Fritze, StefanJohansson, Fredrik O.L.Lindblad, RebeckaBöör, KatalinLindblad, AndreasBerggren, ElinOsinger, BarbaraLewin, ErikJansson, Ulf

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Fritze, StefanJohansson, Fredrik O.L.Lindblad, RebeckaBöör, KatalinLindblad, AndreasBerggren, ElinOsinger, BarbaraLewin, ErikJansson, Ulf
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Inorganic ChemistryDepartment of Chemistry - ÅngströmCondensed Matter Physics of Energy Materials
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Inorganic Chemistry

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