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Keywords = silicon carbide/aluminium interface

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15 pages, 6408 KiB  
Article
Molecular Dynamics Study of Interdiffusion for Cubic and Hexagonal SiC/Al Interfaces
by Masoud Tahani, Eligiusz Postek and Tomasz Sadowski
Crystals 2023, 13(1), 46; https://doi.org/10.3390/cryst13010046 - 27 Dec 2022
Cited by 14 | Viewed by 3279
Abstract
The mechanical properties of the SiC/Al interface are crucial in estimating the overall strength of this ceramic-metal composite. The present work investigates the interdiffusion at the SiC/Al interface using molecular dynamics simulations. One cubic and one hexagonal SiC with a higher probability of [...] Read more.
The mechanical properties of the SiC/Al interface are crucial in estimating the overall strength of this ceramic-metal composite. The present work investigates the interdiffusion at the SiC/Al interface using molecular dynamics simulations. One cubic and one hexagonal SiC with a higher probability of orientations in contact with Al are examined as two samples of metal-matrix nanocomposites with whisker and particulate reinforcements. These reinforcements with the Si- and C-terminated surfaces of the SiC/Al interfaces are also studied. The average main and cross-interdiffusion coefficients are evaluated using a single diffusion couple for each system. The effect of temperature and annealing time are analysed on the self- and interdiffusion coefficients. It is found that the diffusion of Al in SiC is similar in cubic and hexagonal SiC and as expected, the interdiffusion coefficient increases as the temperature and annealing time increase. The model after diffusion can be used to evaluate the overall mechanical properties of the interface region in future studies. Full article
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