Periodic Layer Formation during Multiphase Diffusion in Silicide Systems
| Autor: | AA Alexander Kodentsov, Joanna Wojewoda-Budka, Anna Wierzbicka-Miernik |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Kirkendall effect 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences chemistry.chemical_compound chemistry 0103 physical sciences Silicide Diffusion (business) Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Diffusion Foundations. 21:157-189 |
| ISSN: | 2296-3642 |
| DOI: | 10.4028/www.scientific.net/df.21.157 |
| Popis: | Periodic layered morphology may occur during displacement solid-state reactions in ternary (and higher-order) silicide and other material systems. This periodic layered structure consists of regularly spaced layers (bands) of particles of one reaction product embedded in a matrix phase of another reaction product. The number of systems that is known to produce the periodic layered structure is rather small but increasing and includes metal/metal and metal/ceramic semi-infinite diffusion couples. The experimental results on different systems, where the periodic pattern formation has been observed are systematized and earlier explanations for this peculiar diffusion phenomenon are discussed. Formation of the reaction zone morphologies periodic in time and space can be considered as a manifestation of the Kirkendall effect accompanying interdiffusion in the solid state. The patterning during multiphase diffusion is attributed to diverging vacancy fluxes within the interaction zone. This can generate multiple Kirkendall planes, which by attractingin situ-formed inclusions of “secondary-formed phase” can result in a highly patterned microstructure. |
| Databáze: | OpenAIRE |
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