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Tetragonal distorti...
Tetragonal distortion in magnetron sputtered bcc-W films with supersaturated carbon
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- Mukhamedov, Boburjon (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Fritze, Stefan (författare)
- Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden
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- Ottosson, Mikael, 1962- (författare)
- Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden
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- Osinger, Barbara (författare)
- Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden
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- Lewin, Erik, Dr. 1979- (författare)
- Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden
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- Alling, Björn (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Jansson, Ulf, 1960- (författare)
- Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden
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- Abrikosov, Igor (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Natl Univ Sci & Technol MISIS, Russia
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(creator_code:org_t)
- Elsevier Science Ltd, 2022
- 2022
- Engelska.
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Ingår i: Materials & design. - : Elsevier Science Ltd. - 0264-1275 .- 1873-4197. ; 214
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Carbon has a low solid solubility in bcc tungsten at equilibrium. However, metastable supersaturated solid solutions can be synthesized with magnetron sputtering. Here, we present a systematic study on the phase stability and mechanical properties of such supersaturated W-C solid solutions. H-2h scans show a split of the 200/020 and the 002 peaks for supersaturated films which is explained by a tetragonal distortion of the bcc structure. This split increases with increasing C content and is maximized at 4 at.% C, where we observe an a/b axis of 3.15-3.16 A and a c-axis of 3.21-3.22 A. We performed first-principles calculations of lattice parameters, mixing enthalpies, elastic constants and polycrystalline elastic moduli for cubic and tetragonal W-C solid solutions. Calculations show that tetragonal structure is more stable than the bcc supersaturated solid solution and the calculated lattice parameters and Youngs moduli follow the same trends as the experimental ones as a function of C concentration. The results suggest that supersaturated films with lattice distortion can be used as a design approach to improve the properties of transition metal films with a bcc structure. (c) 2022 The Authors. Published by Elsevier Ltd.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Tungsten; Supersaturated solid solution; Thin film diffraction; Density functional theory; Thermodynamic stability; Elastic property
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Mukhamedov, Bobu ...
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Fritze, Stefan
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Ottosson, Mikael ...
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Osinger, Barbara
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Lewin, Erik, Dr. ...
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Alling, Björn
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Jansson, Ulf, 19 ...
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Abrikosov, Igor
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Linköpings universitet
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