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Age hardening in su...
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Bakhit, Babak,1983-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
(author)
Age hardening in superhard ZrB2-rich Zr1-xTaxBy thin films
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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Elsevier,2021
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-425451
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425451URI
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https://doi.org/10.1016/j.scriptamat.2020.09.026DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170224URI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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We recently showed that sputter-deposited Zr1-xTaxBy thin films have hexagonal AlB2-type columnar nanostructure in which column boundaries are B-rich for x < 0.2, while Ta-rich for x ≥ 0.2. As-deposited layers with x ≥ 0.2 exhibit higher hardness and, simultaneously, enhanced toughness. Here, we study the mechanical properties of ZrB2.4, Zr0.8Ta0.2B1.8, and Zr0.7Ta0.3B1.5 films annealed in Ar atmosphere as a function of annealing temperature Ta up to 1200 °C. In-situ and ex-situ nanoindentation analyses reveal that all films undergo age hardening up to Ta = 800 °C, with the highest hardness achieved for Zr0.8Ta0.2B1.8 (45.5±1.0 GPa). The age hardening, which occurs without any phase separation or decomposition, can be explained by point-defect recovery that enhances chemical bond density. Although hardness decreases at Ta > 800 °C due mainly to recrystallization, column coarsening, and planar defect annihilation, all layers show hardness values above 34 GPa over the entire Ta range.
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Palisaitis, Justinas,1983-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)juspa01
(author)
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Wu, ZhengtaoGuangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Peoples R China.,School of Electromechanical Engineering, Guangdong University of Technology, China
(author)
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Sortica, Mauricio A.Uppsala universitet,Tillämpad kärnfysik,Applied Nuclear Physics, Department of Physics and Astronomy, Uppsala University, Sweden(Swepub:uu)mauso471
(author)
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Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik,Applied Nuclear Physics, Department of Physics and Astronomy, Uppsala University, Sweden(Swepub:uu)danpr521
(author)
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Persson, Per O. Å.,1971-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)perpe25
(author)
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Rosén, Johanna,1975-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)johro07
(author)
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Hultman, Lars,Professor,1960-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)larhu75
(author)
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Petrov, Ivan,1949-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Materials Research Laboratory and Department of Materials Science, University of Illinois, USA; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan(Swepub:liu)ivape26
(author)
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Greene, Joseph E.,1944-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Materials Research Laboratory and Department of Materials Science, University of Illinois, USA; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan(Swepub:liu)josgr17
(author)
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Greczynski, Grzegorz,1973-Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)grzgr49
(author)
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Linköpings universitetTunnfilmsfysik
(creator_code:org_t)
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In:Scripta Materialia: Elsevier191, s. 120-1251359-64621872-8456
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