Institute of Fundamental Technological Research
Polish Academy of Sciences


Mostafa Fathalian, MSc

Department of Information and Computational Science (ZIiNO)
position: PhD Student
PhD student
telephone: (+48) 22 826 12 81 ext.: 183
room: 412

Recent publications
1.  Fathalian M., Postek E.W., Sadowski T., Mechanical and Electronic Properties of Al(111)/6H-SiC Interfaces: A DFT Study, Molecules, ISSN: 1420-3049, DOI: 10.3390/molecules28114345, Vol.28, No.11, pp.4345-1-19, 2023

A density functional theory (DFT) calculation is carried out in this work to investigate the effect of vacancies on the behavior of Al(111)/6H SiC composites. Generally, DFT simulations with appropriate interface models can be an acceptable alternative to experimental methods. We developed two modes for Al/SiC superlattices: C-terminated and Si-terminated interface configurations. C and Si vacancies reduce interfacial adhesion near the interface, while Al vacancies have little effect. Supercells are stretched vertically along the z-direction to obtain tensile strength. Stress–strain diagrams illustrate that the tensile properties of the composite can be improved by the presence of a vacancy, particularly on the SiC side, compared to a composite without a vacancy. Determining the interfacial fracture toughness plays a pivotal role in evaluating the resistance of materials to failure. The fracture toughness of Al/SiC is calculated using the first principal calculations in this paper. Young’s modulus and dominant surface energy are calculated to obtain the fracture toughness. Young’s modulus is higher for C-terminated configurations than for Si-terminated configurations. Surface energy plays a dominant role in determining the fracture toughness process. Finally, to better understand the electronic properties of this system, the density of states (DOS) is calculated.

DFT, interface, surface energy, young’s modulus, fracture toughness

Fathalian M. - IPPT PAN
Postek E.W. - IPPT PAN
Sadowski T. - Lublin University of Technology (PL)

Category A Plus


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