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A kinetic model for...
A kinetic model for stress generation in thin films grown from energetic vapor fluxes
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- Chason, E. (författare)
- Brown University, USA
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- Karlson, M. (författare)
- Brown University, USA
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- Colin, J. J. (författare)
- University of Poitiers, France
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- Magnfält, Daniel (författare)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten
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- Sarakinos, Kostas (författare)
- Linköpings universitet,Nanodesign,Tekniska fakulteten
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- Abadias, G. (författare)
- University of Poitiers, France
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(creator_code:org_t)
- 2016-04-13
- 2016
- Engelska.
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Ingår i: Journal of Applied Physics. - : AMER INST PHYSICS. - 0021-8979 .- 1089-7550. ; 119:14
- Relaterad länk:
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https://www.osti.gov...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We have developed a kinetic model for residual stress generation in thin films grown from energetic vapor fluxes, encountered, e.g., during sputter deposition. The new analytical model considers sub-surface point defects created by atomic peening, along with processes treated in already existing stress models for non-energetic deposition, i.e., thermally activated diffusion processes at the surface and the grain boundary. According to the new model, ballistically induced subsurface defects can get incorporated as excess atoms at the grain boundary, remain trapped in the bulk, or annihilate at the free surface, resulting in a complex dependence of the steady-state stress on the grain size, the growth rate, as well as the energetics of the incoming particle flux. We compare calculations from the model with in situ stress measurements performed on a series of Mo films sputter-deposited at different conditions and having different grain sizes. The model is able to reproduce the observed increase of compressive stress with increasing growth rate, behavior that is the opposite of what is typically seen under non-energetic growth conditions. On a grander scale, this study is a step towards obtaining a comprehensive understanding of stress generation and evolution in vapor deposited polycrystalline thin films. Published by AIP Publishing.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
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