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Effect of WN conten...
Effect of WN content on toughness enhancement in V1–xWxN/MgO(001) thin films
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- Kindlund, Hanna (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Sangiovanni, Davide (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Jensen, Jens (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Chirita, Valeriu (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Petrov, Ivan (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan,Department of Materials Science and the Fredrick Seitz Materials Research Laboratory, University of Illinois, USA
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- Greene, Joseph (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan,Department of Materials Science and the Fredrick Seitz Materials Research Laboratory, University of Illinois, USA
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- Hultman, Lars (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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(creator_code:org_t)
- Linköping : Linköping University Electronic Press, 2014
- 2014
- Engelska.
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Ingår i: Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. - Linköping : Linköping University Electronic Press. - 0734-2101 .- 1520-8559. ; 32:3, s. 030603-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- The authors report the growth and mechanical properties of epitaxial B1 NaCl-structure V1-xWxN/MgO(001) thin films with 0 ≤ x ≤ 0.60. The Gibbs free energy of mixing, calculated using density functional theory (DFT), reveals that cubic V1-xWxN solid solutions with 0 ≤ x ≤ 0.7 are stable against spinodal decomposition and separation into the equilibrium cubic-VN and hexagonal-WN binary phases. The authors show experimentally that alloying VN with WN leads to a monotonic increase in relaxed lattice parameters, enhanced nanoindentation hardnesses, and reduced elastic moduli. Calculated V1-xWxN lattice parameters and elastic moduli (obtained from calculated C11, C12, and C44 elastic constants) are in good agreement with experimental results. The observed increase in alloy hardness, with a corresponding decrease in the elastic modulus at higher x values, combined with DFT-calculated decreases in shear to bulk moduli ratios, and increased Cauchy pressures (C12–C44) with increasing x reveal a trend toward increased toughness.
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