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Early stage spinoda...
Early stage spinodal decomposition and microstructure evolution in TiAlN : A combined in-situ SAXS and phase field study
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- Knutsson, Axel (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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- Ullbrand, Jennifer (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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- Rogström, Lina (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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- Norrby, Niklas (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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- Hultman, Lars (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Almer, Jonathan (author)
- Argonne National Laboratory, Illinois, USA,Advanced Photon Source
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- Johansson, Mats P. (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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- Jansson, Bo (author)
- Seco Tools AB, Fagersta, Sweden
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- Magnus, Odén (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan,Nanostructured Materials
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
Close
- This paper describes in detail the microstructure and phase evolution in Ti0.33Al0.67N and Ti0.50Al0.50N coatings during isothermal annealing, studied by in-situ small angle x-ray scattering (SAXS), in combination with phase field simulations. We show that the isostructural spinodal decomposition occurs in two stages. During the initial stage, the phase segregation proceeds with a constant size of AlN- and TiN-rich domains with an experimentally measured radius of ~0.7 nm for 5 and 20 min at 900 and 850 °C respectively in the Ti0.50Al0.50N alloy. The length of the initial stage depends on temperature as well as metal composition, and is shorter for the higher Al-content coating. After the initial stage, the coherent cubic AlN- and TiN-rich domains coarsen. The coarsening process is kinetically limited by diffusion, which allowed us to estimate the diffusivity and activation energies of the metals to 1.4·10-7 m2s-1 and 3.14 eV at-1 respectively.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Keramteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Ceramics (hsv//eng)
Keyword
- TiAlN
- Phase-field simulations
- Spinodal decomposition
- SAXS
- High energy x-ray diffraction
- Coarsening
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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